Last data update: Dec 02, 2024. (Total: 48272 publications since 2009)
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Sex-specific racial and ethnic variations in short-term outcomes among patients with first or recurrent ischemic stroke: Paul Coverdell National Acute Stroke Program, 2016-2020
Asaithambi G , George MG , Tong X , Lakshminarayan K . J Stroke Cerebrovasc Dis 2024 107560 BACKGROUND AND PURPOSE: To understand the association of sex-specific race and ethnicity on the short-term outcomes of initial and recurrent ischemic stroke events. METHODS: Using the Paul Coverdell National Acute Stroke Program from 2016-2020, we examined 426,062 ischemic stroke admissions from 629 hospitals limited to non-Hispanic White (NHW), non-Hispanic Black (NHB), and Hispanic patients. We performed multivariate logistic regression analyses to assess the combined effects of sex-specific race and ethnicity on short-term outcomes for acute ischemic stroke patients presenting with initial or recurrent stroke events. Outcomes assessed include rates of in-hospital death, discharge to home, and symptomatic intracranial hemorrhage (sICH) after reperfusion treatment. RESULTS: Among studied patients, the likelihood of developing sICH after reperfusion treatment for initial ischemic stroke was not significantly different. The likelihood of experiencing in-hospital death among patients presenting with initial stroke was notably higher among NHW males (AOR 1.59 [95% CI 1.46, 1.73]), NHW females (AOR 1.34 [95% CI 1.23, 1.45]), and Hispanic males (AOR 1.57 [95% CI 1.36, 1.81]) when compared to NHB females. Hispanic females were more likely to be discharged home when compared to NHB females after initial stroke event (AOR 1.32 [95% CI 1.23, 1.41]). NHB males (AOR 0.90 [95% CI 0.87, 0.94]) and NHW females (AOR 0.89 [95% CI 0.86, 0.92]) were less likely to be discharged to home. All groups with recurrent ischemic strokes experienced higher likelihood of in-hospital death when compared to NHB females with the highest likelihood among NHW males (AOR 2.13 [95% CI 1.87, 2.43]). Hispanic females had a higher likelihood of discharging home when compared to NHB females hospitalized for recurrent ischemic stroke, while NHB males and NHW females with recurrent ischemic stroke hospitalizations were less likely to discharge home. CONCLUSIONS: Sex-specific race and ethnic disparities remain for short-term outcomes in both initial and recurrent ischemic stroke hospitalizations. Further studies are needed to address disparities among recurrent ischemic stroke hospitalizations. |
Acute cardiac events during COVID-19-associated hospitalizations
Woodruff RC , Garg S , George MG , Patel K , Jackson SL , Loustalot F , Wortham JM , Taylor CA , Whitaker M , Reingold A , Alden NB , Meek J , Anderson EJ , Weigel A , Henderson J , Bye E , Davis SS , Barney G , Bennett NM , Shiltz E , Sutton M , Talbot HK , Price A , Sperling LS , Havers FP . J Am Coll Cardiol 2023 81 (6) 557-569 BACKGROUND: COVID-19 is associated with cardiac complications. OBJECTIVES: The purpose of this study was to estimate the prevalence, risk factors, and outcomes associated with acute cardiac events during COVID-19-associated hospitalizations among adults. METHODS: During January 2021 to November 2021, medical chart abstraction was conducted on a probability sample of adults hospitalized with laboratory-confirmed SARS-CoV-2 infection identified from 99 U.S. counties in 14 U.S. states in the COVID-19-Associated Hospitalization Surveillance Network. We calculated the prevalence of acute cardiac events (identified by International Classification of Diseases-10th Revision-Clinical Modification codes) by history of underlying cardiac disease and examined associated risk factors and disease outcomes. RESULTS: Among 8,460 adults, 11.4% (95% CI: 10.1%-12.9%) experienced an acute cardiac event during a COVID-19-associated hospitalization. Prevalence was higher among adults who had underlying cardiac disease (23.4%; 95% CI: 20.7%-26.3%) compared with those who did not (6.2%; 95% CI: 5.1%-7.6%). Acute ischemic heart disease (5.5%; 95% CI: 4.5%-6.5%) and acute heart failure (5.4%; 95% CI: 4.4%-6.6%) were the most prevalent events; 0.3% (95% CI: 0.1%-0.5%) experienced acute myocarditis or pericarditis. Risk factors varied by underlying cardiac disease status. Patients with ≥1 acute cardiac event had greater risk of intensive care unit admission (adjusted risk ratio: 1.9; 95% CI: 1.8-2.1) and in-hospital death (adjusted risk ratio: 1.7; 95% CI: 1.3-2.1) compared with those who did not. CONCLUSIONS: Acute cardiac events were common during COVID-19-associated hospitalizations, particularly among patients with underlying cardiac disease, and are associated with severe disease outcomes. Persons at greater risk for experiencing acute cardiac events during COVID-19-associated hospitalizations might benefit from more intensive clinical evaluation and monitoring during hospitalization. |
COVID-19 and Risk of Acute Ischemic Stroke Among Medicare Beneficiaries Aged 65 Years or Older: Self-Controlled Case Series Study.
Yang Q , Tong X , George MG , Chang A , Merritt RK . Neurology 2022 98 (8) e778-e789 BACKGROUND AND OBJECTIVES: Findings of association between COVID-19 and stroke remain inconsistent, ranging from significant association, absence of association to less than expected ischemic stroke among hospitalized patients with COVID-19. The present study examined the association between COVID-19 and risk of acute ischemic stroke (AIS). METHODS: We included 37,379 Medicare fee-for-service (FFS) beneficiaries aged 65 years diagnosed with COVID-19 from April 1, 2020 through February 28, 2021 and AIS hospitalization from January 1, 2019 through February 28, 2021. We used a self-controlled case series design to examine the association between COVID-19 and AIS and estimated the incident rate ratios (IRR) by comparing incidence of AIS in risk periods (0-3, 4-7, 8-14, 15-28 days after diagnosis of COVID-19) vs. control periods. RESULTS: Among 37,379 Medicare FFS beneficiaries with COVID-19 and AIS, the median age at diagnosis of COVID-19 was 80.4 (interquartile range 73.5-87.1) years and 56.7% were women. When AIS at day of exposure (day=0) included in the risk periods, IRRs at 0-3, 4-7, 8-14, and 15-28 days following COVID-19 diagnosis were 10.3 (95% confidence interval 9.86-10.8), 1.61 (1.44-1.80), 1.44 (1.32-1.57), and 1.09 (1.02-1.18); when AIS at day 0 excluded in the risk periods, the corresponding IRRs were 1.77 (1.57-2.01) (day 1-3), 1.60 (1.43-1.79), 1.43 (1.31-1.56), and 1.09 (1.01-1.17), respectively. The association appeared to be stronger among younger beneficiaries and among beneficiaries without prior history of stroke but largely consistent across sex and race/ethnicities. DISCUSSION: Risk of AIS among Medicare FFS beneficiaries was ten times (day 0 cases in the risk period) as high during the first 3 days after diagnosis of COVID-19 as during the control period and the risk associated with COVID-19 appeared to be stronger among those aged 65-74 years and those without prior history of stroke. CLASSIFICATION OF EVIDENCE: This study provides Class IV evidence that SARS-CoV-2 infection, the virus that causes COVID-19, is associated with increased risk of AIS in the first three days after diagnosis in Medicare FFS beneficiaries 65 years age. |
Linking the Paul Coverdell National Acute Stroke Program to commercial claims to establish a framework for real-world longitudinal stroke research
Patorno E , Schneeweiss S , George MG , Tong X , Franklin JM , Pawar A , Mogun H , Moura Lmvr , Schwamm LH . Stroke Vasc Neurol 2021 7 (2) 114-123 BACKGROUND: Non-interventional large-scale research on real-world patients who had a stroke requires the use of multiple data sources ensuring access to longitudinal data from large populations with clinically-detailed information. We sought to establish a framework for longitudinal research on patients hospitalised with stroke by linking information-rich, deidentified inpatient data from the Paul Coverdell National Acute Stroke Program (PCNASP) to commercial and Medicare Advantage longitudinal claims data. METHODS: All stroke admissions in PCNASP between 2008 and 2015 were evaluated for linkage to longitudinal claims from a commercial insurer using an algorithm based on six available common data fields (patient age, gender, admission date, discharge date, discharge diagnosis and state) and a hospital match. We evaluated the linkage quality (via the percentage of unique records in the linked dataset) and the representativeness of the linked population. We also described medical history, stroke severity and patterns of medication use among the PCNASP-claims linked cohort. RESULTS: The linkage produced uniqueness equal to 99.1%. We identified 5644 linked and 98 896 unlinked patients who had an ischaemic stroke hospitalisation in claims data. Linked patients were younger than unlinked (69.7 vs 72.5 years), but otherwise similar by medical history, prestroke medication use or lab values. Stroke severity was mild and most patients were discharged home. Prestroke and discharge use of antihypertensive and statins in the PCNASP were greater than their use as measured by filled prescriptions in claims. CONCLUSIONS: High-quality linkage between the PCNASP and commercial claims data is feasible. This linkage identified differences between reported or recommended versus actual out-of-hospital medication utilisation, highlighting the importance of longitudinal data availability for research aimed to improve the care of patients who had a stroke. |
Contemporary trends in the treatment of mild ischemic stroke with intravenous thrombolysis: Paul Coverdell National Acute Stroke Program
Asaithambi G , Tong X , Coleman King SM , George MG . Cerebrovasc Dis 2021 51 (1) 60-66 Background: Presentation with mild symptoms is a common reason for intravenous thrombolysis (IVT) nonuse among acute ischemic stroke (AIS) patients. We examined the impact of IVT on the outcomes of mild AIS over time. Methods: Using the Paul Coverdell National Stroke Program data, we examined trends in IVT utilization from 2010 to 2019 among AIS patients presenting with National Institutes of Health Stroke Scale (NIHSS) scores ≤5. Outcomes adjudicated included rates of discharge to home and ability to ambulate independently at discharge. We used generalized estimating equation models to examine the effect of IVT on outcomes of AIS patients presenting with mild symptoms and calculated adjusted odds ratio (AOR) with 95% confidence intervals (CI). Results: During the study period, 346,762 patients presented with mild AIS symptoms. Approximately 6.2% were treated with IVT. IVT utilization trends increased from 3.7% in 2010 to 7.7% in 2019 (p < 0.001). Patients treated with IVT had higher median NIHSS scores upon presentation (IVT 3 [2, 4] vs. no IVT 2 [0, 3]). Rates of discharge to home (AOR 2.06, 95% CI: 1.99-2.13) and ability to ambulate at time of discharge (AOR 1.82, 95% CI: 1.76-1.89) were higher among those treated with IVT. Conclusion: There was an increased trend in IVT utilization among AIS patients presenting with mild symptoms. Utilization of IVT increased the odds of being discharged to home and the ability to ambulate at discharge independently in patients with mild stroke. © 2021 The Author(s). Published by S. Karger AG, Basel. |
Effect of insurance status on outcomes of acute ischemic stroke patients receiving intra-arterial treatment: Results from the Paul Coverdell National Acute Stroke Program
Asaithambi G , Tong X , Lakshminarayan K , Coleman King SM , George MG . J Stroke Cerebrovasc Dis 2021 30 (5) 105692 BACKGROUND: Stroke continues to be a leading cause of death and disability in the United States. Rates of intra-arterial reperfusion treatments (IAT) for acute ischemic stroke (AIS) are increasing, and these treatments are associated with more favorable outcomes. We sought to examine the effect of insurance status on outcomes for AIS patients receiving IAT within a multistate stroke registry. METHODS: We used data from the Paul Coverdell National Acute Stroke Program (PCNASP) from 2014 to 2019 to quantify rates of IAT (with or without intravenous thrombolysis) after AIS. We modeled outcomes based on insurance status: private, Medicare, Medicaid, or no insurance. Outcomes were defined as rates of discharge to home, in-hospital death, symptomatic intracranial hemorrhage (sICH), or life-threatening hemorrhage during hospitalization. RESULTS: During the study period, there were 486,180 patients with a clinical diagnosis of AIS (mean age 70.6 years, 50.3% male) from 674 participating hospitals in PCNASP. Only 4.3% of patients received any IAT. As compared to private insurance, uninsured patients receiving any IAT were more likely to experience in-hospital death (AOR 1.36 [95% CI 1.07-1.73]). Medicare (AOR 0.78 [95% CI 0.71-0.85]) and Medicaid (AOR 0.85 [95% CI 0.75-0.96]) beneficiaries were less likely but uninsured patients were more likely (AOR 1.90 [95% CI 1.61-2.24]) to be discharged home. Insurance status was not found to be independently associated with rates of sICH. CONCLUSIONS: Insurance status was independently associated with in-hospital death and discharge to home among AIS patients undergoing IAT. |
Racial/ethnic and geographic variations in long-term survival among Medicare beneficiaries after acute ischemic stroke
Tong X , Schieb L , George MG , Gillespie C , Merritt RK , Yang Q . Prev Chronic Dis 2021 18 E15 INTRODUCTION: Little information is available about racial/ethnic and geographic variations in long-term survival among older patients (≥65) after acute ischemic stroke (AIS). METHODS: We examined data on 1,019,267 Medicare fee-for-service (FFS) beneficiaries aged 66 or older, hospitalized with a primary diagnosis of AIS from 2008 through 2012. Survival was defined as the time from the date of AIS to date of death, or an end of follow-up date of December 31, 2017. We used Cox proportional hazard models to estimate 5-year survival after AIS, adjusted for age, sex, race and Hispanic ethnicity, poverty level, Charlson Comorbidity Index, and state. RESULTS: Among 1,019,267 Medicare FFS beneficiaries hospitalized with AIS from 2008 through 2012, we documented 701,718 deaths (68.8%) during a median of 4 years of follow-up with 4.08 million person-years. The overall adjusted 5-year survival was 44%. Non-Hispanic Black men had the lowest 5-year survival, and 5-year survival varied significantly by state, from the highest at 49.1% (North Dakota) to the lowest at 40.5% (Hawaii). The ranges between the highest and lowest 5-year survival rates across states also varied significantly by racial/ethnic groups, with percentage point differences of 9.6 among non-Hispanic White, 11.3 among non-Hispanic Black, 17.7 among Hispanic, and 28.5 among other racial/ethnic beneficiaries. CONCLUSION: We identified significant racial/ethnic and geographic variations in 5-year survival rates after AIS among 2008-2012 Medicare FFS beneficiaries. Further study is needed to understand the reasons for these variations and develop prevention strategies to improve survival and racial disparities in survival after AIS. |
Changing spatiotemporal trends in county-level heart failure death rates in the United States, 1999 to 2018
Vaughan AS , George MG , Jackson SL , Schieb L , Casper M . J Am Heart Assoc 2021 10 (4) e018125 Background Amid recently rising heart failure (HF) death rates in the United States, we describe county-level trends in HF mortality from 1999 to 2018 by racial/ethnic group and sex for ages 35 to 64 years and 65 years and older. Methods and Results Applying a hierarchical Bayesian model to National Vital Statistics data representing all US deaths, ages 35 years and older, we estimated annual age-standardized county-level HF death rates and percent change by age group, racial/ethnic group, and sex from 1999 through 2018. During 1999 to 2011, ~30% of counties experienced increasing HF death rates among adults ages 35 to 64 years. However, during 2011 to 2018, 86.9% (95% CI, 85.2-88.2) of counties experienced increasing mortality. Likewise, for ages 65 years and older, during 1999 to 2005 and 2005 to 2011, 27.8% (95% CI, 25.8-29.8) and 12.6% (95% CI, 11.2-13.9) of counties, respectively, experienced increasing mortality. However, during 2011 to 2018, most counties (67.4% [95% CI, 65.4-69.5]) experienced increasing mortality. These temporal patterns by age group held across racial/ethnic group and sex. Conclusions These results provide local context to previously documented recent national increases in HF death rates. Although county-level declines were most common before 2011, some counties and demographic groups experienced increasing HF death rates during this period of national declines. However, recent county-level increases were pervasive, occurring across counties, racial/ethnic group, and sex, particularly among ages 35 to 64 years. These spatiotemporal patterns highlight the need to identify and address underlying clinical risk factors and social determinants of health contributing to these increasing trends. |
Emergency medical services utilization for acute stroke care: Analysis of the Paul Coverdell National Acute Stroke Program, 2014-2019
Asaithambi G , Tong X , Lakshminarayan K , Coleman King SM , George MG , Odom EC . Prehosp Emerg Care 2021 26 (3) 1-9 OBJECTIVE: Emergency medical service (EMS) transportation after acute stroke is associated with shorter symptom-to-arrival times and more rapid medical attention when compared to patient transportation by private vehicle. METHODS: We analyzed data from the Paul Coverdell National Acute Stroke Program from 2014 to 2019 among stroke (ischemic and hemorrhagic) and transient ischemic attack (TIA) patients to examine patterns in EMS utilization. RESULTS: Of 500,829 stroke and TIA patients (mean age 70.9 years, 51.3% women) from 682 participating hospitals during the study period, 60% arrived by EMS. Patients aged 18-64 years vs. ≥65 years (AOR 0.67) were less likely to utilize EMS. Severe stroke patients (AOR 2.29, 95%CI, 2.15-2.44) and hemorrhagic stroke patients vs. ischemic stroke patients (AOR 1.47, 95% CI, 1.43-1.51) were more likely to utilize EMS. Medicare (AOR 1.35, 95% CI, 1.32-1.38) and Medicaid (AOR 1.41, 95% CI, 1.37-1.45) beneficiaries were more likely than privately insured patients to utilize EMS, but no difference was found between no insurance/self-pay patients and privately insured patients on EMS utilization. Overall, there was a decreasing trend in the utilization of EMS (59.6% to 59.3%, p = 0.037). The decreasing trend was identified among ischemic stroke (p < 0.0001) patients but not among TIA (p = 0.89) or hemorrhagic stroke (p = 0.44) patients. There was no observed trend in pre-notification among stroke patients' arrival by EMS across the study period (56.9% to 56.5%, p = 0.99). CONCLUSIONS: Strategies to help increase stroke awareness and utilization of EMS among those with symptoms of stroke should be considered in order to help improve stroke outcomes. |
Trends of risk profile among middle-aged adults hospitalized for acute ischemic stroke in United States 2006-2017
Tong X , Yang Q , George MG , Gillespie C , Merritt RK . Int J Stroke 2020 16 (7) 855-862 BACKGROUND: Recent studies reported increasing trends in hospitalization of stroke patients aged 35-64 years. AIM: To examine changes in risk factor profiles among patients aged 35-64 years hospitalized with acute ischemic stroke between 2006 and 2017 in the United States. METHODS: We used data from the National Inpatient Sample of the Healthcare Cost and Utilization Project from 2006 through 2017. Principal ICD-9-CM/ICD-10-CM codes were used to identify acute ischemic stroke hospitalizations, and secondary codes were used to identify the presence of four major stroke risk factors: hypertension, diabetes, lipid disorders, and tobacco use. We used the relative percent change to assess the changes in the prevalence of risk profile between 2006-2007 and 2016-2017 and linear regression models to obtain the p values for the overall trends across six time periods. RESULTS: Approximately 1.5 million acute ischemic stroke hospitalizations occurred during 2006-2017. The prevalence of having all four risk factors increased from 4.1% in 2006-2007 to 9.1% in 2016-2017 (relative percent change 122.0%, p < 0.001 for trend), prevalence of any three risk factors increased from 24.5% to 33.8% (relative percent change 38.0%, p < 0.001). Prevalence of only two risk factors decreased from 36.1% to 32.7% (p < 0.001), only one risk factor decreased from 25.2% to 18.1% (p < 0.001), and absence of risk factors decreased from 10.1% to 6.2% (p < 0.001). The most prevalent triad of risk factors was hypertension, diabetes, and lipid disorders (14.3% in 2006-2007 and 19.8% in 2016-2017), and the most common dyad risk factors was hypertension and lipid disorders (12.6% in 2006-2007 and 11.9% in 2016-2017). CONCLUSIONS: The prevalence of hospitalized acute ischemic stroke patients aged 35-64 years with all four or any three of four major stroke risk factors increased by 122% and 38%, while those with only one risk factor or no risk factor has declined by 28% and 39%, respectively, from 2006 to 2017. Younger adults are increasingly at higher risk for stroke from preventable and treatable risk factors. This growing public health problem will require clinicians, healthcare systems, and public health efforts to implement more effective prevention strategies among this population. |
Comparison of three devices for 24-hour ambulatory blood pressure monitoring in a nonclinical environment through a randomized trial
Nwankwo T , Coleman King SM , Ostchega Y , Zhang G , Loustalot F , Gillespie C , Chang TE , Begley EB , George MG , Shimbo D , Schwartz JE , Muntner P , Kronish IM , Hong Y , Merritt R . Am J Hypertens 2020 33 (11) 1021-1029 BACKGROUND: The U.S. Preventive Services Task Force recommends the use of 24-hour ambulatory blood pressure monitoring (ABPM) as part of screening and diagnosis of hypertension. The optimal ABPM device for population-based surveys is unknown. OBJECTIVE: Among three ABPM devices, we compared the proportion of valid BP readings, mean awake and asleep BP readings, differences between awake ABPM readings and initial standardized BP readings, and sleep experience. RESULTS: The proportions of valid blood pressure readings were not different among the three devices ( p > 0.45). Mean awake and asleep systolic BP were significantly higher for STO device (WA vs. STO vs. SL: 126.65 mmHg, 138.09 mmHg, 127.44 mmHg; 114.34 mmHg, 120.34 mmHg, 113.13 mmHg; p <0.0001 for both). The difference between the initial average standardized mercury systolic BP readings and the ABPM mean awake systolic BP was larger for STO device (WA vs. STO. vs. SL: -5.26 mmHg, -16.24 mmHg, -5.36 mmHg; p <0.0001); diastolic BP mean differences were ~ -6 mmHg for all three devices ( p =0.6). Approximately 55% of participants reported that the devices interfered with sleep; however, there were no sleep differences across the devices (p >0.4 for all). CONCLUSION: Most of the participants met the threshold of 70% valid readings over 24 hours. Sleep disturbance was common but did not interfere with completion of measurement in most of the participants. |
Effect of herpes zoster vaccine and antiviral treatment on risk of ischemic stroke
Yang Q , George MG , Chang A , Tong X , Merritt R , Hong Y . Neurology 2020 95 (6) e708-e717 OBJECTIVE: To determine whether increased risk of acute ischemic stroke (AIS) following herpes zoster (HZ) might be modified by the status of Zoster Vaccine Live (ZVL) vaccination and antiviral treatment following HZ. METHODS: We included 87,405 Medicare fee-for-service beneficiaries aged >/=66 years diagnosed with HZ and AIS from 2008-2017. We used a self-controlled case series design to examine the association between HZ and AIS, and estimated incident rate ratios (IRR) by comparing incidence of AIS in risk periods vs. control periods. To examine effect modification by ZVL and antiviral treatment, beneficiaries were classified into four mutually exclusive groups: (1) no vaccination and no antiviral treatment; (2) vaccination only; (3) antiviral treatment only; and (4) both vaccination and antiviral treatment. We tested for interaction to examine changes in IRRs across 4-groups. RESULTS: Among 87,405 beneficiaries with HZ and AIS, 22.0%, 2.0%, 70.1% and 5.8% were in groups 1 to 4, respectively. IRRs in 0-14, 15-30, 31-90, and 91-180 days following HZ were 1.89 (95% confidence interval [CI],1.77-2.02), 1.58 (95% CI,1.47-1.69), 1.36 (95% CI,1.31-1.42), and 1.19 (95% CI,1.15-1.23), respectively. There was no evidence of effect modification by ZVL and antiviral treatment on AIS (p=0.067 for interaction). The pattern of association between HZ and risk for AIS was largely consistent across age group, sex, and race. CONCLUSIONS: Risk of AIS increased significantly following HZ, and this increased risk was not modified by ZVL and antiviral treatment. Our findings suggest the importance of following recommended HZ vaccination in prevention of HZ and HZ-associated AIS. |
Dietary sodium intake and health indicators: A systematic review of published literature between January 2015 and December 2019
Overwyk KJ , Quader ZS , Maalouf J , Bates M , Webster J , George MG , Merritt RK , Cogswell ME . Adv Nutr 2020 11 (5) 1174-1200 As the science surrounding population sodium reduction evolves, monitoring and evaluating new studies on intake and health can help increase our understanding of the associated benefits and risks. Here we describe a systematic review of recent studies on sodium intake and health, examine the risk of bias (ROB) of selected studies, and provide direction for future research. Seven online databases were searched monthly from January 2015 to December 2019. We selected human studies that met specified population, intervention, comparison, outcome, time, setting/study design (PICOTS) criteria and abstracted attributes related to the study population, design, intervention, exposure, and outcomes, and evaluated ROB for the subset of studies on sodium intake and cardiovascular disease risks or indicators. Of 41,601 abstracts reviewed, 231 studies were identified that met the PICOTS criteria and ROB was assessed for 54 studies. One hundred and fifty-seven (68%) studies were observational and 161 (70%) focused on the general population. Five types of sodium interventions and a variety of urinary and dietary measurement methods were used to establish and quantify sodium intake. Five observational studies used multiple 24-h urine collections to assess sodium intake. Evidence mainly focused on cardiovascular-related indicators (48%) but encompassed an assortment of outcomes. Studies varied in ROB domains and 87% of studies evaluated were missing information on >/=1 domains. Two or more studies on each of 12 outcomes (e.g., cognition) not previously included in systematic reviews and 9 new studies at low ROB suggest the need for ongoing or updated systematic reviews of evidence on sodium intake and health. Summarizing evidence from assessments on sodium and health outcomes was limited by the various methods used to measure sodium intake and outcomes, as well as lack of details related to study design and conduct. In line with research recommendations identified by the National Academies of Science, future research is needed to identify and standardize methods for measuring sodium intake. |
Trends in hospital procedure volumes for intra-arterial treatment of acute ischemic stroke: results from the Paul Coverdell National Acute Stroke Program
Asaithambi G , Tong X , Lakshminarayan K , Coleman King SM , George MG . J Neurointerv Surg 2020 12 (11) 1076-1079 BACKGROUND: Rates of intra-arterial revascularization treatments (IAT) for acute ischemic stroke (AIS) are increasing in the USA. Using a multi-state stroke registry, we studied the trend in IAT use among patients with AIS over a period spanning 11 years. We examined the impact of IAT rates on hospital procedure volumes and patient outcome after stroke. METHODS: We used data from the Paul Coverdell National Acute Stroke Program (PCNASP) and explored trends in IAT between 2008 and 2018. Patient outcomes were examined by rates of IAT procedures across hospitals. Specifically, outcomes were compared across low-volume (<15 IAT per year), medium-volume (15-30 IAT per year), and high-volume hospitals (>30 IAT per year). Favorable outcome was defined as discharge to home. RESULTS: There were 612 958 patients admitted with AIS to 687 participating hospitals within the PCNASP during this study. Only 2.9% of patients (mean age 68.5 years, 49.3% women) received IAT. The percent of patients with AIS receiving IAT increased from 1% in 2008 to 5.3% in 2018 (p<0.001). The proportion of low-volume hospitals decreased over time (p<0.001), and the proportions of medium-volume (p=0.007) and high-volume hospitals (p<0.001) increased between 2008 and 2018. When compared with medium-volume hospitals, high-volume hospitals had a higher (p<0.0001) and low-volume hospitals had a lower (p<0.0001) percent of patients discharged to home. CONCLUSION: High-volume hospitals were associated with a higher rate of favorable outcome. With the increased use of IAT among patients with AIS, the proportion of low-volume hospitals performing IAT significantly decreased. |
Risk factors for ischemic stroke in younger adults: A focused update
George MG . Stroke 2020 51 (3) 729-735 Ischemic stroke in younger adults is far less common than among older adults, yet the underlying pathogenesis and risk factors are more diverse. Approximately 10%-15% of all strokes occur in adults ages 18-50.1-4 In part, because of this, the diagnosis of stroke in younger adults can be challenging to differentiate from stroke mimics and to identify the cause or underlying pathogenesis. The TOAST (Trial of ORG 10172 in Acute Stroke Treatment) classification system5 (Table 1) is parsimonious, yet many younger stroke patients have pathogeneses that are more likely to fall under cardioembolism, other determined pathogenesis, or undetermined pathogenesis rather than large artery atherosclerosis or small vessel occlusion.1,6 Recent studies, both in the United States and Europe, have suggested that ischemic stroke in younger adults is increasing and have demonstrated increases in traditional stroke risk factors that are typically common among older adults (hypertension, dyslipidemia, diabetes mellitus, tobacco use, and obesity) to also be common among younger acute stroke patients.1,7-13 Among younger adults presenting with acute stroke, in whom there has been an increasing prevalence of comorbid traditional cardiovascular disease risk factors, there is debate about whether or how much those traditional risk factors contribute to the cause of stroke,4,14 particularly for those <40 years of age. This review examines some of the common and rarer pathogeneses of ischemic stroke in younger adults (Table 2). |
Notes from the Field: Characteristics of Million Hearts hypertension control champions, 2012-2019
Ritchey MD , Hannan J , Wall HK , George MG , Sperling LS . MMWR Morb Mortal Wkly Rep 2020 69 (7) 196-197 Million Hearts is a national initiative co-led by CDC and the Centers for Medicare & Medicaid Services that aims to prevent 1 million heart attacks, strokes, and other related acute cardiovascular events by 2022 (1,2). On November 19, 2019, the initiative recognized 17 Million Hearts Hypertension Control Champions for achieving ≥80% blood pressure control rates among their patients with hypertension. These Champions include clinicians, practices, health centers, and health systems from 15 states that provide care for 201,045 adult patients, approximately one third (68,019) of whom have hypertension. The Hypertension Control Challenge is held annually to identify new Champions, with a call for applications in the spring, review and vetting in the summer, and announcement of Champions in the late fall. Since 2012, Million Hearts has recognized 118 Champions from 36 states and the District of Columbia who care for more than 15 million adult patients, including 5 million with hypertension (Table).* |
Current trends in the acute treatment of ischemic stroke: analysis from the Paul Coverdell National Acute Stroke Program
Asaithambi G , Tong X , Lakshminarayan K , Coleman King SM , George MG . J Neurointerv Surg 2019 12 (6) 574-578 BACKGROUND: The intra-arterial treatment (IAT) of acute ischemic stroke (AIS) is now evidence-based and given the highest level of recommendation among eligible patients. Using a multi-state stroke registry, we studied the trend in IAT among patients with AIS over 11 years and its impact on the utilization of intravenous thrombolysis (IVT) within the same 11 years. METHODS: Using data from the Paul Coverdell National Acute Stroke Program (PCNASP), we studied trends in IVT and IAT for patients with AIS between 2008 and 2018. Trends over time were examined for rates of IVT only, IAT only, or a combination of IVT and IAT (IVT+IAT). Favorable outcome was defined as discharge to home. RESULTS: During the study period there were 595 677 patients (mean age 70.4 years, 50.4% women) from 646 participating hospitals with a clinical diagnosis of AIS in the PCNASP. Trends for IVT only, IAT only, and IVT+IAT all significantly increased over time (P<0.001). Total use of IVT and IAT increased from 7% in 2008 to 19.1% in 2018. The rate of patients discharged to home increased significantly over time among all treatment groups (P<0.001). CONCLUSION: In our large registry-based analysis, we observed a significant increase in the use of IAT for the treatment of AIS, with continued increases in the use of IVT. Concurrently, the percent of patients with favorable outcomes continued to increase. |
US trends in premature heart disease mortality over the past 50 years: Where do we go from here
Ritchey MD , Wall HK , George MG , Wright JS . Trends Cardiovasc Med 2019 30 (6) 364-374 Despite the premature heart disease mortality rate among adults aged 25-64 decreasing by 70% since 1968, the rate has remained stagnant from 2011 on and, in 2017, still accounted for almost 1-in-5 of all deaths among this age group. Moreover, these overall findings mask important differences and continued disparities observed by demographic characteristics and geography. For example, in 2017, rates were 134% higher among men compared to women and 87% higher among blacks compared to whites, and, while the greatest burden remained in the southeastern US, almost two-thirds of all US counties experienced increasing rates among adults aged 35-64 during 2010-2017. Continued high rates of uncontrolled blood pressure and increasing prevalence of diabetes and obesity pose obstacles for re-establishing a downward trajectory for premature heart disease mortality; however, proven public health and clinical interventions exist that can be used to address these conditions. |
Trends and factors associated with concordance between International Classification of Diseases, Ninth and Tenth Revision, Clinical Modification Codes and stroke clinical diagnoses
Chang TE , Tong X , George MG , Coleman King SM , Yin X , O'Brien S , Ibrahim G , Liskay A , Wiltz JL . Stroke 2019 50 (8) Strokeaha118024092 Background and Purpose- International Classification of Diseases, Ninth and Tenth Revision, Clinical Modification ( ICD-9-CM and ICD-10-CM) codes are often used for disease surveillance. We examined changes in concordance between ICD-CM codes and clinical diagnoses before and after the transition to ICD-10-CM in the United States (October 1, 2015), and determined if there were systematic variations in concordance by patient and hospital characteristics. Methods- We included Paul Coverdell National Acute Stroke Program patient discharges from 2014 to 2017. Concordance between ICD-CM codes and the clinical diagnosis documented by the physician (assumed as accurate) was calculated for each diagnosis category: ischemic stroke, transient ischemic attack, subarachnoid hemorrhage, and intracerebral hemorrhage. Results- In total, 314 857 patient records were included in the analysis (n=280 hospitals), 55.9% of which were obtained after the transition to ICD-10-CM. While concordance was generally high, a small, and temporary decline occurred from the last calendar quarter of ICD-9-CM (average unadjusted concordance =92.8%) to the first quarter of ICD-10-CM use (91.0%). Concordance differed by diagnosis category and was generally highest for ischemic stroke. In the analysis of ICD-10-CM records, disagreements often occurred between ischemic stroke and transient ischemic attack records and between subarachnoid and intracerebral hemorrhage records. Compared with the smallest hospitals (</=200 beds), larger hospitals had significantly higher odds of concordance (ischemic stroke adjusted odds ratio for >/=400 beds, 1.7; 95% CI, 1.5-1.9). Conclusions- This study identified a small and transient decline in concordance between ICD-CM codes and stroke clinical diagnoses during the coding transition, indicating no substantial impact on the overall identification of stroke patients. Researchers and policymakers should remain aware of potential changes in ICD-CM code accuracy over time, which may affect disease surveillance. Systematic variations in the accuracy of codes by hospital and patient characteristics have implications for quality-of-care studies and hospital comparative assessments. |
The burden of cerebrovascular disease in the United States
Tong X , Yang Q , Ritchey MD , George MG , Jackson SL , Gillespie C , Merritt RK . Prev Chronic Dis 2019 16 E52 INTRODUCTION: Little is known about trends in the overall combined burden of fatal and nonfatal cerebrovascular disease events in the United States. Our objective was to describe the combined burden by age, sex, and region from 2006 through 2014. METHODS: We used data on adults aged 35 and older from 2006 through 2014 Nationwide Emergency Department Sample, National Inpatient Sample of the Healthcare Cost and Utilization Project, and the National Vital Statistics System. We calculated age-standardized cerebrovascular disease event rates by using the 2010 US Census population. Trends in rates were assessed by calculating the relative percentage change (RPC) between 2006 and 2014, and by using Joinpoint to obtain P values for overall trends. RESULTS: The age-standardized rate increased significantly for total cerebrovascular disease events (primary plus comorbid events) from 1,050 per 100,000 in 2006 to 1,147 per 100,000 in 2014 (P < .05 for trend). Treat-and-release emergency department visits with comorbid cerebrovascular disease events increased significantly, from 114 per 100,000 in 2006 to 213 per 100,000 in 2014 (RPC of 87%, P < .05 for trend). Significant rate increases were identified among adults aged 35 to 64 with an RPC of 19% in primary cerebrovascular disease events, 48% in comorbid cerebrovascular disease events, and 36% in total events. CONCLUSION: Our findings have important implications for the increasing cerebrovascular disease burden among adults aged 35 to 64. Focused prevention strategies should be implemented, especially among young adults who may be unaware of existing modifiable risk factors. |
Detecting moderate or complex congenital heart defects in adults from an electronic health records system
Diallo AO , Krishnaswamy A , Shapira SK , Oster ME , George MG , Adams JC , Walker ER , Weiss P , Ali MK , Book W . J Am Med Inform Assoc 2018 25 (12) 1634-1642 Background: The prevalence of moderate or complex (moderate-complex) congenital heart defects (CHDs) among adults is increasing due to improved survival, but many patients experience lapses in specialty care or their CHDs are undocumented in the medical system. There is, to date, no efficient approach to identify this population. Objective: To develop and assess the performance of a risk score to identify adults aged 20-60 years with undocumented specific moderate-complex CHDs from electronic health records (EHR). Methods: We used a case-control study (596 adults with specific moderate-complex CHDs and 2384 controls). We extracted age, race/ethnicity, electrocardiogram (EKG), and blood tests from routine outpatient visits (1/2009 through 12/2012). We used multivariable logistic regression models and a split-sample (4: 1 ratio) approach to develop and internally validate the risk score, respectively. We generated receiver operating characteristic (ROC) c-statistics and Brier scores to assess the ability of models to predict the presence of specific moderate-complex CHDs. Results: Out of six models, the non-blood biomarker model that included age, sex, and EKG parameters offered a high ROC c-statistic of 0.96 [95% confidence interval: 0.95, 0.97] and low Brier score (0.05) relative to the other models. The adult moderate-complex congenital heart defect risk score demonstrated good accuracy with 96.4% sensitivity and 80.0% specificity at a threshold score of 10. Conclusions: A simple risk score based on age, sex, and EKG parameters offers early proof of concept and may help accurately identify adults with specific moderate-complex CHDs from routine EHR systems who may benefit from specialty care. |
A decade of improvement in door-to-needle time among acute ischemic stroke patients, 2008 to 2017
Tong X , Wiltz JL , George MG , Odom EC , Coleman King SM , Chang T , Yin X , Merritt RK . Circ Cardiovasc Qual Outcomes 2018 11 (12) e004981 BACKGROUND: The clinical benefit of intravenous (IV) alteplase in acute ischemic stroke is time dependent. We assessed the overall temporal changes in door-to-needle (DTN) time and examine the factors associated with DTN time </=60 and </=45 minutes. METHODS AND RESULTS: A total of 496 336 acute ischemic stroke admissions were identified in the Paul Coverdell National Acute Stroke Program from 2008 to 2017. We used generalized estimating equations models to examine the factors associated with DTN time </=60 and </=45 minutes, and calculated adjusted odds ratios and 95% CI. Between 2008 and 2017, the percentage of acute ischemic stroke patients who received IV alteplase including those transferred, increased from 6.4% to 15.3%. After excluding those who received IV alteplase at an outside hospital, a total of 39 737 (8%) acute ischemic stroke patients received IV alteplase within 4.5 hours of the time the patient last known to be well. Significant increases were seen in DTN time </=60 minutes (26.4% in 2008 to 66.2% in 2017, P<0.001), as well as DTN time </=45 minutes (10.7% in 2008 to 40.5% in 2017, P<0.001). Patients aged 55 to 84 years were more likely to receive IV alteplase within 60 minutes, while those aged 55 to 74 years were more likely to receive IV alteplase within 45 minutes, as compared with those aged 18 to 54 years. Arrival by emergency medical service, and patients with severe stroke were more likely to receive IV alteplase within 60 and 45 minutes. Conversely, women, black patients as compared with white, and patients with a medical history of diseases associated with stroke were less likely to receive DTN time </=60 or 45 minutes. CONCLUSIONS: Rapid improvements in DTN time were observed in the Paul Coverdell National Acute Stroke Program; however, opportunities to reduce disparities remain. |
Vital Signs: Prevalence of key cardiovascular disease risk factors for Million Hearts 2022 - United States, 2011-2016
Wall HK , Ritchey MD , Gillespie C , Omura JD , Jamal A , George MG . MMWR Morb Mortal Wkly Rep 2018 67 (35) 983-991 INTRODUCTION: Despite decades-long reductions in cardiovascular disease (CVD) mortality, CVD mortality rates have recently plateaued and even increased in some subgroups, and the prevalence of CVD risk factors remains high. Million Hearts 2022, a 5-year initiative, was launched in 2017 to address this burden. This report establishes a baseline for the CVD risk factors targeted for reduction by the initiative during 2017-2021 and highlights recent changes over time. METHODS: Risk factor prevalence among U.S. adults was assessed using data from the National Health and Nutrition Examination Survey, National Survey on Drug Use and Health, and National Health Interview Survey. Multivariate analyses were performed to assess differences in prevalence during 2011-2012 and the most recent cycle of available data, and across subgroups. RESULTS: During 2013-2014, the prevalences of aspirin use for primary and secondary CVD prevention were 27.4% and 74.9%, respectively, and of statin use for cholesterol management was 54.5%. During 2015-2016, the average daily sodium intake was 3,535 mg/day and the prevalences of blood pressure control, combustible tobacco use, and physical inactivity were 48.5%, 22.3%, and 29.1%, respectively. Compared with 2011-2012, significant decreases occurred in the prevalences of combustible tobacco use and physical inactivity; however, a decrease also occurred for aspirin use for primary or secondary prevention. Disparities in risk factor prevalences were observed across age groups, genders, and racial/ethnic groups. CONCLUSIONS AND IMPLICATIONS FOR PUBLIC HEALTH PRACTICE: Millions of Americans have CVD risk factors that place them at increased risk for having a cardiovascular event, despite the existence of proven strategies for preventing or managing CVD risk factors. A concerted effort to implement these strategies will be needed to prevent one million acute cardiovascular events during the 5-year initiative. |
Characteristics of health care practices and systems that excel in hypertension control
Young A , Ritchey MD , George MG , Hannan J , Wright J . Prev Chronic Dis 2018 15 E73 Approximately 1 in 3 US adults has hypertension, but only half have their blood pressure controlled. We identified characteristics of health care practices and systems (hereinafter practices) effective in achieving control rates at or above 70% by using data collected via applications submitted from April through June 2017 for consideration in the Million Hearts Hypertension Control Challenge. We included 96 practices serving 635,000 patients with hypertension across 34 US states in the analysis. Mean hypertension control rate was 77.1%; 27.1% of practices had a control rate of 80% or greater. Although many practices served large populations with multiple risk factors for uncontrolled hypertension, high control rates were achieved with implementation of evidenced-based strategies. |
Patient-reported outcomes after ischemic stroke as part of routine care
George MG , Zhao X . Neurology 2018 90 (16) 717-718 Stroke is, unfortunately, an all too frequently experienced event and one that leaves the lives of patients and their families profoundly changed in a matter of minutes. Survival post stroke has markedly improved over the last 15 years with increasing rates in the use of IV alteplase and, more recently, the ability to perform successful endovascular reperfusion for large vessel strokes; however, the outcomes that matter to clinicians are often not the outcomes that matter most to survivors of stroke.1 Previous research has shown that, among patients with a normal modified Rankin Scale (mRS) score, there is a wide distribution of outcomes for physical function, fatigue, and other domains of cognition and social function.2,3 Providing treatment plans and ongoing care for stroke survivors requires understanding the outcomes that are most meaningful to patients because of the variety of poststroke affected domains. Identifying, documenting, and addressing meaningful patient-centric outcomes for each patient is essential for her or his optimal rehabilitation and recovery.4 |
Age-specific cost effectiveness of using intravenous recombinant tissue plasminogen activator for treating acute ischemic stroke
Joo H , Wang G , George MG . Am J Prev Med 2017 53 S205-s212 INTRODUCTION: Studies have demonstrated that intravenous recombinant tissue plasminogen activator (IV rtPA) is a cost-effective treatment for acute ischemic stroke. Age-specific cost effectiveness has not been well examined. This study estimated age-specific incremental cost-effectiveness ratios (ICERs) of IV rtPA treatment versus no IV rtPA. METHODS: A Markov model was developed to examine the economic impact of IV rtPA over a 20-year time horizon on four age groups (18-44, 45-64, 65-80, and ≥81 years) from the U.S. healthcare sector perspective. The model used health outcomes from a national stroke registry adjusted by parameters from previous literature and current hospitalization costs in 2013 U.S. dollars. Long-term annual costs and quality-adjusted life years (QALYs) in the years after a stroke were discounted at 3% per year. Incremental costs, incremental QALYs, and ICERs were estimated and sensitivity analyses were conducted between 2015 and 2017. RESULTS: Use of IV rtPA gained 0.55 QALYs and cost $3,941 more than no IV rtPA for stroke patients aged ≥18 years over a 20-year time horizon. IV rtPA was a dominant strategy compared to no IV rtPA for patients aged 18-44 and 45-64 years. For patients aged 65-80 years, IV rtPA gained 0.44 QALYs and cost $4,872 more than no IV rtPA (ICER=$11,132/QALY). For patients aged ≥81 years, ICER was estimated at $48,676/QALY. CONCLUSIONS: IV rtPA saved costs and improved health outcomes for patients aged 18-64 years and was cost effective for those aged ≥65 years. These findings support the use of IV rtPA. |
CDC Grand Rounds: Improving medication adherence for chronic disease management - innovations and opportunities
Neiman AB , Ruppar T , Ho M , Garber L , Weidle PJ , Hong Y , George MG , Thorpe PG . MMWR Morb Mortal Wkly Rep 2017 66 (45) 1248-1251 Adherence to prescribed medications is associated with improved clinical outcomes for chronic disease management and reduced mortality from chronic conditions (1). Conversely, nonadherence is associated with higher rates of hospital admissions, suboptimal health outcomes, increased morbidity and mortality, and increased health care costs (2). In the United States, 3.8 billion prescriptions are written annually (3). Approximately one in five new prescriptions are never filled, and among those filled, approximately 50% are taken incorrectly, particularly with regard to timing, dosage, frequency, and duration (4). Whereas rates of nonadherence across the United States have remained relatively stable, direct health care costs associated with nonadherence have grown to approximately $100-$300 billion of U.S. health care dollars spent annually (5,6). Improving medication adherence is a public health priority and could reduce the economic and health burdens of many diseases and chronic conditions (7). |
Emergency department, hospital inpatient, and mortality burden of atrial fibrillation in the United States, 2006 to 2014
Jackson SL , Tong X , Yin X , George MG , Ritchey MD . Am J Cardiol 2017 120 (11) 1966-1973 The prevalence of atrial fibrillation (AF) is increasing in the United States as the population ages, but national surveillance is lacking. This cross-sectional study (2006 to 2014) analyzed data from the Healthcare Cost and Utilization Project's Nationwide Emergency Department Sample, the National (Nationwide) Inpatient Sample, and the National Vital Statistics System. Event totals were estimated independently for emergency department (ED) visits, hospitalizations, and mortality, and then collectively after applying criteria to identify mutually exclusive events. Rates were calculated for AF as primary diagnosis or underlying cause of death (primary AF), as well as secondary diagnosis or contributing cause of death (co-morbid AF), and standardized by age to the 2010 US population. From 2006 to 2014, event rates increased for primary AF (249 to 268 per 100,000) and co-morbid AF (1,473 to 1,835 per 100,000). In 2014, an estimated 599,790 ED visits, 453,060 hospitalizations, and 21,712 deaths listed AF as primary. A total of 684,470 mutually exclusive primary AF and 4,695,997 mutually exclusive co-morbid AF events occurred. Among ED visits and hospitalizations with primary AF, the most common secondary diagnoses were hypertension, heart failure, ischemic heart disease, and diabetes. The mean cost per hospitalization with primary AF was $8,819. Mean costs were higher for those with co-morbid AF versus those without co-morbid AF among hospitalizations with a primary diagnosis of ischemic heart disease, heart failure, stroke, hypertension, or diabetes (all p ≤0.01). In conclusion, with the substantial health and economic impact of AF and an aging US population, improved diagnosis, prevention, management, and surveillance of AF are increasingly important. |
Vital Signs: Recent trends in stroke death rates - United States, 2000-2015
Yang Q , Tong X , Schieb L , Vaughan A , Gillespie C , Wiltz JL , King SC , Odom E , Merritt R , Hong Y , George MG . MMWR Morb Mortal Wkly Rep 2017 66 (35) 933-939 INTRODUCTION: The prominent decline in U.S. stroke death rates observed for more than 4 decades has slowed in recent years. CDC examined trends and patterns in recent stroke death rates among U.S. adults aged ≥35 years by age, sex, race/ethnicity, state, and census region. METHODS: Trends in the rates of stroke as the underlying cause of death during 2000-2015 were analyzed using data from the National Vital Statistics System. Joinpoint software was used to identify trends in stroke death rates, and the excess number of stroke deaths resulting from unfavorable changes in trends was estimated. RESULTS: Among adults aged ≥35 years, age-standardized stroke death rates declined 38%, from 118.4 per 100,000 persons in 2000 to 73.3 per 100,000 persons in 2015. The annual percent change (APC) in stroke death rates changed from 2000 to 2015, from a 3.4% decrease per year during 2000-2003, to a 6.6% decrease per year during 2003-2006, a 3.1% decrease per year during 2006-2013, and a 2.5% (nonsignificant) increase per year during 2013-2015. The last trend segment indicated a reversal from a decrease to a statistically significant increase among Hispanics (APC = 5.8%) and among persons in the South Census Region (APC = 4.2%). Declines in stroke death rates failed to continue in 38 states, and during 2013-2015, an estimated 32,593 excess stroke deaths might not have occurred if the previous rate of decline could have been sustained. CONCLUSIONS AND IMPLICATIONS FOR PUBLIC HEALTH PRACTICE: Prior declines in stroke death rates have not continued in recent years, and substantial variations exist in timing and magnitude of change by demographic and geographic characteristics. These findings suggest the importance of strategically identifying opportunities for prevention and intervening in vulnerable populations, especially because effective and underused interventions to prevent stroke incidence and death are known to exist. |
Unexplained variation for hospitals' use of inpatient rehabilitation and skilled nursing facilities after an acute ischemic stroke
Xian Y , Thomas L , Liang L , Federspiel JJ , Webb LE , Bushnell CD , Duncan PW , Schwamm LH , Stein J , Fonarow GC , Hoenig H , Montalvo C , George MG , Lutz BJ , Peterson ED , Bettger JP . Stroke 2017 48 (10) 2836-2842 BACKGROUND AND PURPOSE: Rehabilitation is recommended after a stroke to enhance recovery and improve outcomes, but hospital's use of inpatient rehabilitation facilities (IRFs) or skilled nursing facility (SNF) and the factors associated with referral are unknown. METHODS: We analyzed clinical registry and claims data for 31 775 Medicare beneficiaries presenting with acute ischemic stroke from 918 Get With The Guidelines-Stroke hospitals who were discharged to either IRF or SNF between 2006 and 2008. Using a multilevel logistic regression model, we evaluated patient and hospital characteristics, as well as geographic availability, in relation to discharge to either IRF or SNF. After accounting for observed factors, the median odds ratio was reported to quantify hospital-level variation in the use of IRF versus SNF. RESULTS: Of 31 775 patients, 17 662 (55.6%) were discharged to IRF and 14 113 (44.4%) were discharged to SNF. Compared with SNF patients, IRF patients were younger, more were men, had less health-service use 6 months prestroke, and had fewer comorbid conditions and in-hospital complications. Use of IRF or SNF varied significantly across hospitals (median IRF use, 55.8%; interquartile range, 34.8%-75.0%; unadjusted median odds ratio, 2.59; 95% confidence interval, 2.44-2.77). Hospital-level variation in discharge rates to IRF or SNF persisted after adjustment for patient, clinical, and geographic variables (adjusted median odds ratio, 2.87; 95% confidence interval, 2.68-3.11). CONCLUSIONS: There is marked unexplained variation among hospitals in their use of IRF versus SNF poststroke even after accounting for clinical characteristics and geographic availability. CLINICAL TRIAL REGISTRATION: URL: https://clinicaltrials.gov.Unique identifier: NCT02284165. |
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