Last data update: Sep 23, 2024. (Total: 47723 publications since 2009)
Records 1-30 (of 37 Records) |
Query Trace: Lansky A [original query] |
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Characteristics of mpox vaccine recipients among a sample of men who have sex with men with presumed exposure to mpox
Abara WE , Sullivan P , Carpino T , Sanchez T , Atkins K , Delaney K , Edwards OW , Marissa H , Baral S , Ogale Y , Galloway E , Lansky A . Sex Transm Dis 2023 50 (7) 458-461 Mpox vaccination is recommended for persons exposed to or at risk for mpox. About 25% of an online sample of MSM with presumed mpox exposure were vaccinated (≥1 dose). Vaccination was higher among younger MSM and MSM concerned about mpox or reporting sexual risk behaviors. Incorporating mpox vaccination into routine sexual health care and increasing 2-dose vaccination uptake is essential to preventing mpox acquisition, improving MSM sexual health, and averting future mpox outbreaks. |
Community Guide methods for systematic reviews of economic evidence
Chattopadhyay SK , Jacob V , Hopkins DP , Lansky A , Elder R , Cuellar AE , Calonge N , Clymer JM . Am J Prev Med 2022 INTRODUCTION: Community Guide systematic economic reviews provide information on the cost, economic benefit, cost-benefit, and cost-effectiveness of public health interventions recommended by the Community Preventive Services Task Force on the basis of evidence of effectiveness. The number and variety of economic evaluation studies in public health have grown substantially over time, contributing to methodologic challenges that required updates to the methods for Community Guide systematic economic reviews. This paper describes these updated methods. METHODS: The 9-step Community Guide economic review process includes prioritization of topic, creation of a coordination team, conceptualization of review, literature search, screening studies for inclusion, abstraction of studies, analysis of results, translation of evidence to Community Preventive Services Task Force economic findings, and dissemination of findings and evidence gaps. The methods applied in each of these steps are reported in this paper. RESULTS: Two published Community Guide reviews, tailored pharmacy-based interventions to improve adherence to medications for cardiovascular disease and permanent supportive housing with housing first to prevent homelessness, are used to illustrate the application of the updated methods. The Community Preventive Services Task Force reached a finding of cost-effectiveness for the first intervention and a finding of favorable cost-benefit for the second on the basis of results from the economic reviews. CONCLUSIONS: The updated Community Guide economic systematic review methods provide transparency and improve the reliability of estimates that are used to derive a Community Preventive Services Task Force economic finding. This may in turn augment the utility of Community Guide economic reviews for communities making decisions about allocating limited resources to effective programs. |
Strategies adopted by gay, bisexual, and other men who have sex with men to prevent Monkeypox virus transmission - United States, August 2022
Delaney KP , Sanchez T , Hannah M , Edwards OW , Carpino T , Agnew-Brune C , Renfro K , Kachur R , Carnes N , DiNenno EA , Lansky A , Ethier K , Sullivan P , Baral S , Oster AM . MMWR Morb Mortal Wkly Rep 2022 71 (35) 1126-30 What is already known about this topic? A global monkeypox outbreak is currently primarily affecting gay, bisexual, and other men who have sex with men. What is added by this report? In a recent survey of gay, bisexual, and other men who have sex with men, approximately one half reported reducing their number of sex partners, one-time sexual encounters, and use of dating apps because of the monkeypox outbreak. Receipt of vaccine to protect against monkeypox varied by race, ethnicity, and geography. What are the implications for public health practice? It is essential that public health programs continue to deliver tailored, respectful harm reduction messages that do not create stigma to diverse communities of men who have sex with men. Vaccine programs should prioritize efforts to maximize equitable access. © 2022 Department of Health and Human Services. All rights reserved. |
Priority topics for the Community Preventive Services Task Force, 2020-2025: A data-driven, partner-informed approach
Lansky A , Wethington HR , Mattick K , Chin MH , Alston A , Racine-Parshall J , Minor SL , Cobb J , Hopkins DP . Am J Prev Med 2022 62 (6) e375-e378 INTRODUCTION: The Community Preventive Services Task Force periodically engages in a process to identify priority topics to guide their work. This article described the process and results for selecting priority topics to guide the work of the Community Preventive Services Task Force for the period 2020-2025. METHODS: The Community Preventive Services Task Force started with Healthy People 2020 topics. They solicited input on topics from partner organizations and the public. The Community Preventive Services Task Force considered information on 8 criteria for each topic. They conducted preliminary voting and applied a priori decision rules regarding the voting results. The Community Preventive Services Task Force then engaged in facilitated deliberations and took a final vote. This process occurred October 2019-June 2020. RESULTS: From Healthy People 2020, a total of 37 topics were selected as the starting point. The initial voting and decision rules resulted in 3 topics being determined as priorities. Community Preventive Services Task Force members considered data and information on the criteria to inform their deliberations on an additional 7 topics. A total of 9 topics were selected as the set of priorities for 2020-2025. CONCLUSIONS: Having a process that is routine and data-driven ensures that the selection of priorities is sound. By reviewing priority topics every 5 years, the Community Preventive Services Task Force will continue to provide relevant recommendations on community preventive services to improve the nation's health. |
Decreases in COVID-19 Cases, Emergency Department Visits, Hospital Admissions, and Deaths Among Older Adults Following the Introduction of COVID-19 Vaccine - United States, September 6, 2020-May 1, 2021.
Christie A , Henley SJ , Mattocks L , Fernando R , Lansky A , Ahmad FB , Adjemian J , Anderson RN , Binder AM , Carey K , Dee DL , Dias T , Duck WM , Gaughan DM , Lyons BC , McNaghten AD , Park MM , Reses H , Rodgers L , Van Santen K , Walker D , Beach MJ . MMWR Morb Mortal Wkly Rep 2021 70 (23) 858-864 Throughout the COVID-19 pandemic, older U.S. adults have been at increased risk for severe COVID-19-associated illness and death (1). On December 14, 2020, the United States began a nationwide vaccination campaign after the Food and Drug Administration's Emergency Use Authorization of Pfizer-BioNTech COVID-19 vaccine. The Advisory Committee on Immunization Practices (ACIP) recommended prioritizing health care personnel and residents of long-term care facilities, followed by essential workers and persons at risk for severe illness, including adults aged ≥65 years, in the early phases of the vaccination program (2). By May 1, 2021, 82%, 63%, and 42% of persons aged ≥65, 50-64, and 18-49 years, respectively, had received ≥1 COVID-19 vaccine dose. CDC calculated the rates of COVID-19 cases, emergency department (ED) visits, hospital admissions, and deaths by age group during November 29-December 12, 2020 (prevaccine) and April 18-May 1, 2021. The rate ratios comparing the oldest age groups (≥70 years for hospital admissions; ≥65 years for other measures) with adults aged 18-49 years were 40%, 59%, 65%, and 66% lower, respectively, in the latter period. These differential declines are likely due, in part, to higher COVID-19 vaccination coverage among older adults, highlighting the potential benefits of rapidly increasing vaccination coverage. |
Living systematic reviews and other approaches for updating evidence
Lansky A , Wethington HR . Am J Public Health 2020 110 (11) 1687-1688 Systematic reviews use predetermined criteria to identify studies on a clearly defined issue, then assess their quality, synthesize the evidence, and draw conclusions from the included studies. In some cases, conclusions from systematic reviews are linked to recommendations, such as those made by the US Preventive Services Task Force and the Community Preventive Services Task Force,1 or to guidelines for clinical practice. For recommendations or guidelines to be accurate and a reliable resource for decision-makers, the evidence must be up to date. A relatively new method for updating systematic reviews is called a “living” systematic review, in which a systematic review is updated as new research becomes available and relevant evidence is incorporated into the review. |
Evaluating the evidence for more frequent than annual HIV screening of gay, bisexual, and other men who have sex with men in the United States: Results from a systematic review and CDC Expert Consultation
DiNenno EA , Prejean J , Delaney KP , Bowles K , Martin T , Tailor A , Dumitru G , Mullins MM , Hutchinson A , Lansky A . Public Health Rep 2017 133 (1) 33354917738769 The Centers for Disease Control and Prevention (CDC) recommended in 2006 that sexually active gay, bisexual, and other men who have sex with men (MSM) be screened for human immunodeficiency virus (HIV) at least annually. A workgroup comprising CDC and external experts conducted a systematic review of the literature, including benefits, harms, acceptability, and feasibility of annual versus more frequent screening among MSM, to determine whether evidence was sufficient to change the current recommendation. Four consultations with managers of public and nonprofit HIV testing programs, clinics, and mathematical modeling experts were conducted to provide input on the programmatic and scientific evidence. Mathematical models predicted that more frequent than annual screening of MSM could prevent some new HIV infections and would be more cost-effective than annual screening, but this evidence was considered insufficient due to study design. Evidence supports CDC's current recommendation that sexually active MSM be screened at least annually. However, some MSM might benefit from more frequent screening. Future research should evaluate which MSM subpopulations would benefit most from more frequent HIV screening. |
Recommendations for HIV screening of gay, bisexual, and other men who have sex with men - United States, 2017
DiNenno EA , Prejean J , Irwin K , Delaney KP , Bowles K , Martin T , Tailor A , Dumitru G , Mullins MM , Hutchinson AB , Lansky A . MMWR Morb Mortal Wkly Rep 2017 66 (31) 830-832 CDC's 2006 recommendations for human immunodeficiency virus (HIV) testing state that all persons aged 13-64 years should be screened for HIV at least once, and that persons at higher risk for HIV infection, including sexually active gay, bisexual, and other men who have sex with men (MSM), should be rescreened at least annually (1). Authors of reports published since 2006, including CDC (2), suggested that MSM, a group that is at highest risk for HIV infection, might benefit from being screened more frequently than once each year. In 2013, the U.S. Preventive Services Task Force (USPSTF) found insufficient evidence to specify an HIV rescreening interval but recommended annual screening for MSM as a reasonable approach (3). However, some HIV providers have begun to offer more frequent screening, such as once every 3 or 6 months, to some MSM. A CDC work group conducted a systematic literature review and held four expert consultations to review programmatic experience to determine whether there was sufficient evidence to change the 2006 CDC recommendation (i.e., at least annual HIV screening of MSM in clinical settings). The CDC work group concluded that the evidence remains insufficient to recommend screening more frequently than at least once each year. CDC continues to recommend that clinicians screen asymptomatic sexually active MSM at least annually. Each clinician can consider the benefits of offering more frequent screening (e.g., once every 3 or 6 months) to individual MSM at increased risk for acquiring HIV infection, weighing their patients' individual risk factors, local HIV epidemiology, and local testing policies. |
Lifetime risk of a diagnosis of HIV infection in the United States
Hess KL , Hu X , Lansky A , Mermin J , Hall HI . Ann Epidemiol 2017 27 (4) 238-243 PURPOSE: To estimate lifetime risk of receiving an HIV diagnosis in the United States if existing infection rates continue. METHODS: We used mortality, census, and HIV surveillance data for 2010 to 2014 to calculate age-specific probabilities of an HIV diagnosis. The probabilities were applied to a hypothetical cohort of 10 million live births to estimate lifetime risk. RESULTS: Lifetime risk was 1 in 68 for males and 1 in 253 for females. Lifetime risk for men was 1 in 22 for blacks, 1 in 51 for Hispanic/Latinos, and 1 in 140 for whites; and for women was 1 in 54 for blacks, 1 in 256 for Hispanic/Latinas, and 1 in 941 for whites. By risk group, the highest risk was among men who have sex with men (1 in 6) and the lowest was among male heterosexuals (1 in 524). Most of the states with the highest lifetime risk were in the South. CONCLUSIONS: The estimates highlight different risks across populations and the need for continued improvements in prevention and treatment. They can also be used to communicate the risk of HIV infection and increase public awareness of HIV. |
Estimating the number of heterosexual persons in the United States to calculate national rates of HIV infection
Lansky A , Johnson C , Oraka E , Sionean C , Joyce MP , DiNenno E , Crepaz N . PLoS One 2015 10 (7) e0133543 BACKGROUND: This study estimated the proportions and numbers of heterosexuals in the United States (U.S.) to calculate rates of heterosexually acquired human immunodeficiency virus (HIV) infection. Quantifying the burden of disease can inform effective prevention planning and resource allocation. METHODS: Heterosexuals were defined as males and females who ever had sex with an opposite-sex partner and excluded those with other HIV risks: persons who ever injected drugs and males who ever had sex with another man. We conducted meta-analysis using data from 3 national probability surveys that measured lifetime (ever) sexual activity and injection drug use among persons aged 15 years and older to estimate the proportion of heterosexuals in the United States population. We then applied the proportion of heterosexual persons to census data to produce population size estimates. National HIV infection rates among heterosexuals were calculated using surveillance data (cases attributable to heterosexual contact) in the numerators and the heterosexual population size estimates in the denominators. RESULTS: Adult and adolescent heterosexuals comprised an estimated 86.7% (95% confidence interval: 84.1%-89.3%) of the U.S. population. The estimate for males was 84.1% (CI: 81.2%-86.9%) and for females was 89.4% (95% CI: 86.9%-91.8%). The HIV diagnosis rate for 2013 was 5.2 per 100,000 heterosexuals and the rate of persons living with diagnosed HIV infection in 2012 was 104 per 100,000 heterosexuals aged 13 years or older. Rates of HIV infection were >20 times as high among black heterosexuals compared to white heterosexuals, indicating considerable disparity. Rates among heterosexual men demonstrated higher disparities than overall population rates for men. CONCLUSIONS: The best available data must be used to guide decision-making for HIV prevention. HIV rates among heterosexuals in the U.S. are important additions to cost effectiveness and other data used to make critical decisions about resources for prevention of HIV infection. |
Population size estimates for men who have sex with men and persons who inject drugs
Oster AM , Sternberg M , Lansky A , Broz D , Wejnert C , Paz-Bailey G . J Urban Health 2015 92 (4) 733-43 Understanding geographic variation in the numbers of men who have sex with men (MSM) and persons who inject drugs (PWID) is critical to targeting and scaling up HIV prevention programs, but population size estimates are not available at generalizable sub-national levels. We analyzed 1999-2010 National Health and Nutrition Examination Survey data on persons aged 18-59 years. We estimated weighted prevalence of recent (past 12 month) male-male sex and injection drug use by urbanicity (the degree to which a geographic area is urban) and US census region and calculated population sizes. Large metro areas (population ≥1,000,000) had higher prevalence of male-male sex (central areas, 4.4 % of men; fringe areas, 2.5 %) compared with medium/small metro areas (1.4 %) and nonmetro areas (1.1 %). Injection drug use did not vary by urbanicity and neither varied by census region. Three-quarters of MSM, but only half of PWID, resided in large metro areas. Two-thirds of MSM and two-thirds of PWID resided in the South and West. Efforts to reach MSM would benefit from being focused in large metro areas, while efforts to reach PWID should be delivered more broadly. These data allow for more effective allocation of funds for prevention programs. |
Human immunodeficiency virus transmission at each step of the care continuum in the United States
Skarbinski J , Rosenberg E , Paz-Bailey G , Hall HI , Rose CE , Viall AH , Fagan JL , Lansky A , Mermin JH . JAMA Intern Med 2015 175 (4) 588-96 Importance: Human immunodeficiency virus (HIV) transmission risk is primarily dependent on behavior (sexual and injection drug use) and HIV viral load. National goals emphasize maximizing coverage along the HIV care continuum, but the effect on HIV prevention is unknown. Objectives: To estimate the rate and number of HIV transmissions attributable to persons at each of the following 5 HIV care continuum steps: HIV infected but undiagnosed, HIV diagnosed but not retained in medical care, retained in care but not prescribed antiretroviral therapy, prescribed antiretroviral therapy but not virally suppressed, and virally suppressed. Design, Setting, and Participants: A multistep, static, deterministic model that combined population denominator data from the National HIV Surveillance System with detailed clinical and behavioral data from the National HIV Behavioral Surveillance System and the Medical Monitoring Project to estimate the rate and number of transmissions along the care continuum. This analysis was conducted January 2013 to June 2014. The findings reflect the HIV-infected population in the United States in 2009. Main Outcomes and Measures: Estimated rate and number of HIV transmissions. Results: Of the estimated 1 148 200 persons living with HIV in 2009, there were 207 600 (18.1%) who were undiagnosed, 519 414 (45.2%) were aware of their infection but not retained in care, 47 453 (4.1%) were retained in care but not prescribed ART, 82 809 (7.2%) were prescribed ART but not virally suppressed, and 290 924 (25.3%) were virally suppressed. Persons who are HIV infected but undiagnosed (18.1% of the total HIV-infected population) and persons who are HIV diagnosed but not retained in medical care (45.2% of the population) were responsible for 91.5% (30.2% and 61.3%, respectively) of the estimated 45 000 HIV transmissions in 2009. Compared with persons who are HIV infected but undiagnosed (6.6 transmissions per 100 person-years), persons who were HIV diagnosed and not retained in medical care were 19.0% (5.3 transmissions per 100 person-years) less likely to transmit HIV, and persons who were virally suppressed were 94.0% (0.4 transmissions per 100 person-years) less likely to transmit HIV. Men, those who acquired HIV via male-to-male sexual contact, and persons 35 to 44 years old were responsible for the most HIV transmissions by sex, HIV acquisition risk category, and age group, respectively. Conclusions and Relevance: Sequential steps along the HIV care continuum were associated with reduced HIV transmission rates. Improvements in HIV diagnosis and retention in care, as well as reductions in sexual and drug use risk behavior, primarily for persons undiagnosed and not receiving antiretroviral therapy, would have a substantial effect on HIV transmission in the United States. |
Binge drinking and risky sexual behavior among HIV-negative and unknown HIV status men who have sex with men, 20 US cities
Hess KL , Chavez PR , Kanny D , DiNenno E , Lansky A , Paz-Bailey G . Drug Alcohol Depend 2015 147 46-52 BACKGROUND: Men who have sex with men (MSM) represent over half of new HIV infections in the United States. It is important to understand the factors associated with engaging in risky sexual behavior to develop effective prevention interventions. Binge drinking (≥5 drinks on ≥1 occasion) is the most common form of excessive alcohol consumption. This study examines the relationship between binge drinking and sexual risk behaviors among MSM who are current drinkers and who were either HIV-negative or unaware of their HIV status. METHODS: Using the 2011 National HIV Behavioral Surveillance system and multivariable Poisson models with robust error estimates, we assessed the association between binge drinking and sexual risk behaviors among current drinkers. Prevalence ratios (PR) and 95% confidence intervals (CI) are presented. RESULTS: Overall, 85% of MSM were current drinkers, and 59% of MSM who drank reported ≥1 episode of binge drinking in the preceding 30 days. In multivariable models, binge drinking was associated with condomless anal intercourse (CAI) at last sex with an HIV-positive or unknown status partner (receptive: PR 1.3, 95% CI 1.1-1.6; insertive: PR 1.2, 95% CI 1.0-1.4), having exchanged sex for money or drugs at last sex (PR: 1.4, 95% CI 1.1-1.7), having concurrent partners in the past year (PR: 1.1, 95% CI 1.1-1.2), and having more CAI partners in the past year (PR: 1.2, 95% CI 1.0-1.4) compared to non-binge drinkers. CONCLUSIONS: Evidence-based strategies for reducing binge drinking could help reduce risky sexual behavior among MSM. |
Declining HIV incidence among women in the United States
Lansky A , Hall I , Mermin J . Womens Health Issues 2014 24 (6) 581-583 HIV infection is a major health issue for women in the United States. There are an estimated 275,700 women living with HIV (Centers for Disease Control and Prevention [CDC], 2013b) and stark racial and ethnic differences exist. In 2011, the rate of HIV diagnoses among Black/African-American women was 20 times the rate among White women and the rate of HIV diagnoses among Hispanic/Latina women was 4 times the rate among White women (CDC, 2013a). Recent data show promising trends. Comparing 2008 with 2010, the estimated number of new HIV infections among women in the United States decreased by 21%, from 12,000 in 2008 to 9,500 in 2010 (CDC, 2012; Figure 1). During the same time period, there were also decreases among women in the number of HIV diagnoses (17% decrease) and AIDS diagnoses (14% decrease; CDC, 2013a). However, significant decreases in HIV incidence were found only for Black women, with a decrease of 21% from 7,700 new infections in 2008 to 6,100 in 2010 (CDC, 2012), and for women with infection attributed to heterosexual contact, with a decrease of 18% from 9,800 new infections in 2008 to 8,000 in 2010 (CDC, 2012; Figure 1). |
Hispanics or Latinos living with diagnosed HIV: progress along the continuum of HIV care - United States, 2010
Gant Z , Bradley H , Hu X , Skarbinski J , Hall HI , Lansky A . MMWR Morb Mortal Wkly Rep 2014 63 (40) 886-90 The goals of the National HIV/AIDS Strategy are to reduce new human immunodeficiency virus (HIV) infections, increase access to care and improve health outcomes for persons living with HIV, and reduce HIV-related health disparities. In July 2013, by presidential executive order, the HIV Care Continuum Initiative was established, focusing on accelerating federal efforts to increase HIV testing, care, and treatment. Hispanics or Latinos are disproportionately affected by HIV infection; the annual rate of HIV diagnosis among Hispanics or Latinos is approximately three times that of non-Hispanic whites. To achieve the goals of the National HIV/AIDS Strategy, and to be consistent with the HIV Care Continuum Initiative, Hispanics or Latinos living with HIV infection need improved levels of care and viral suppression. Achieving these goals calls for 85% of Hispanics or Latinos with diagnosed HIV to be linked to care, 80% to be retained in care, and the proportion with an undetectable viral load (VL) to increase 20% by 2015. Analysis of data from the National HIV Surveillance System (NHSS) and the Medical Monitoring Project (MMP) regarding progress along the HIV care continuum during 2010 for Hispanics or Latinos with diagnosed HIV infection indicated that 80.3% of HIV-diagnosed Hispanics or Latinos were linked to care, 54.4% were retained in care, 44.4% were prescribed antiretroviral therapy (ART), and 36.9% had achieved viral suppression (VL result of ≤200 copies/mL). Among Hispanic or Latino males and females, the percentages that were linked to care, were prescribed ART, and had achieved viral suppression were similar; however, the percentage retained in care was lower among males compared with females. The levels of linkage to care and viral suppression were lower among Hispanics or Latinos with HIV infection attributed to injection drug use than among those with HIV infection attributed to heterosexual or male-to-male sexual contact. These data demonstrate the need for implementation of interventions and public health strategies that increase linkage to care, retention in care, and consistent ART among Hispanics or Latinos, particularly Hispanics or Latinos who inject drugs. |
Men living with diagnosed HIV who have sex with men: progress along the continuum of HIV care - United States, 2010
Singh S , Bradley H , Hu X , Skarbinski J , Hall HI , Lansky A . MMWR Morb Mortal Wkly Rep 2014 63 (38) 829-33 Gay, bisexual, and other men who have sex with men (MSM) represent approximately 2% of the United States population, yet are the risk group most affected by human immunodeficiency virus (HIV). In 2010, among persons newly infected with HIV, 63% were MSM; among persons living with HIV, 52% were MSM. The three goals of the National HIV/AIDS Strategy are to reduce new HIV infections, to increase access to care and improve health outcomes for persons living with HIV, and to reduce HIV-related health disparities. In July 2013, the HIV Care Continuum Initiative was established by executive order to mobilize and accelerate federal efforts to increase HIV testing, services, and treatment along the continuum. To meet the 2015 targets of the National HIV/AIDS Strategy, 85% of MSM diagnosed with HIV should be linked to care, 80% should be retained in care, and the proportion with an undetectable viral load (VL) should be increased by 20%. To assess progress toward meeting these targets, CDC assessed the level at each step of the continuum of care for MSM by age and race/ethnicity. CDC analyzed data from the National HIV Surveillance System (NHSS) and the Medical Monitoring Project (MMP) for MSM with diagnosed HIV infection. The results indicated that 77.5% were linked to care, 50.9% were retained in care, 49.5% were prescribed antiretroviral therapy (ART), and 42.0% had achieved viral suppression. Younger MSM and black/African American MSM had lower levels of care compared with older MSM and those of all other races/ethnicities. Interventions aimed at MSM are needed that increase linkage to care, retention in care, and ART use, particularly among MSM aged <25 years and black/African American MSM. |
Trends in diagnoses of HIV infection in the United States, 2002-2011
Johnson AS , Hall HI , Hu X , Lansky A , Holtgrave DR , Mermin J . JAMA 2014 312 (4) 432-434 There has been increasing emphasis on care and treatment for persons with human immunodeficiency virus (HIV) in the United States during the past decade,(,) including the use of antiretroviral therapy for increasing survival and decreasing transmission. Accurate HIV diagnosis data recently became available for all states, allowing for the first time an examination of long-term national trends. These data can be used to monitor awareness of serostatus among persons living with HIV, primary prevention efforts, and testing initiatives. We examined trends in HIV diagnoses from 2002-2011 in the United States using data from the National HIV Surveillance System of the US Centers for Disease Control and Prevention (CDC). |
Sexual risk behaviour and viral suppression among HIV-infected adults receiving medical care in the United States
Mattson CL , Freedman M , Fagan JL , Frazier EL , Beer L , Huang P , Valverde EE , Johnson C , Sanders C , McNaghten AD , Sullivan P , Lansky A , Mermin J , Heffelfinger J , Skarbinski J , Mattson CL , Freedman M , Fagan JL , Frazier EL , Beer L , Huang P , Valverde EE , Johnson C , Sanders C , Lansky A , Mermin J , Heffelfinger J , Skarbinski J , Medical Monitoring Project . AIDS 2014 28 (8) 1203-1211 OBJECTIVE: To describe the prevalence and association of sexual risk behaviours and viral suppression among HIV-infected adults in the United States. DESIGN: Cross-sectional analysis of weighted data from a probability sample of HIV-infected adults receiving outpatient medical care. The facility and patient response rates were 76 and 51%, respectively. METHODS: We analysed 2009 interview and medical record data. Sexual behaviours were self-reported in the past 12 months. Viral suppression was defined as all viral load measurements in the medical record during the past 12 months less than 200 copies/ml. RESULTS: An estimated 98 022 (24%) HIV-infected adults engaged in unprotected vaginal or anal sex; 50 953 (12%) engaged in unprotected vaginal or anal sex with at least one partner of negative or unknown HIV status; 23 933 (6%) did so while not virally suppressed. Persons who were virally suppressed were less likely than persons who were not suppressed to engage in vaginal or anal sex [prevalence ratio, 0.88; 95% confidence interval (CI), 0.82-0.93]; unprotected vaginal or anal sex (prevalence ratio, 0.85; 95% CI, 0.73-0.98); and unprotected vaginal or anal sex with a partner of negative or unknown HIV status (prevalence ratio, 0.79; 95% CI, 0.64-0.99). CONCLUSION: The majority of HIV-infected adults receiving medical care in the U.S. did not engage in sexual risk behaviours that have the potential to transmit HIV, and of the 12% who did, approximately half were not virally suppressed. Persons who were virally suppressed were less likely than persons who were not suppressed to engage in sexual risk behaviours. |
Estimating the number of persons who inject drugs in the United States by meta-analysis to calculate national rates of HIV and hepatitis C virus infections
Lansky A , Finlayson T , Johnson C , Holtzman D , Wejnert C , Mitsch A , Gust D , Chen R , Mizuno Y , Crepaz N . PLoS One 2014 9 (5) e97596 BACKGROUND: Injection drug use provides an efficient mechanism for transmitting bloodborne viruses, including human immunodeficiency virus (HIV) and hepatitis C virus (HCV). Effective targeting of resources for prevention of HIV and HCV infection among persons who inject drugs (PWID) is based on knowledge of the population size and disparity in disease burden among PWID. This study estimated the number of PWID in the United States to calculate rates of HIV and HCV infection. METHODS: We conducted meta-analysis using data from 4 national probability surveys that measured lifetime (3 surveys) or past-year (3 surveys) injection drug use to estimate the proportion of the United States population that has injected drugs. We then applied these proportions to census data to produce population size estimates. To estimate the disease burden among PWID by calculating rates of disease we used lifetime population size estimates of PWID as denominators and estimates of HIV and HCV infection from national HIV surveillance and survey data, respectively, as numerators. We calculated rates of HIV among PWID by gender-, age-, and race/ethnicity. RESULTS: Lifetime PWID comprised 2.6% (95% confidence interval: 1.8%-3.3%) of the U.S. population aged 13 years or older, representing approximately 6,612,488 PWID (range: 4,583,188-8,641,788) in 2011. The population estimate of past-year PWID was 0.30% (95% confidence interval: 0.19 %-0.41%) or 774,434 PWID (range: 494,605-1,054,263). Among lifetime PWID, the 2011 HIV diagnosis rate was 55 per 100,000 PWID; the rate of persons living with a diagnosis of HIV infection in 2010 was 2,147 per 100,000 PWID; and the 2011 HCV infection rate was 43,126 per 100,000 PWID. CONCLUSION: Estimates of the number of PWID and disease rates among PWID are important for program planning and addressing health inequities. |
Estimating per-act HIV transmission risk: a systematic review
Patel P , Borkowf CB , Brooks JT , Lasry A , Lansky A , Mermin J . AIDS 2014 28 (10) 1509-19 BACKGROUND: Effective HIV prevention programs rely on accurate estimates of the per-act risk of HIV acquisition from sexual and parenteral exposures. We updated the previous risk estimates of HIV acquisition from parenteral, vertical, and sexual exposures, and assessed the modifying effects of factors including condom use, male circumcision, and antiretroviral therapy. METHODS: We conducted literature searches to identify new studies reporting data regarding per-act HIV transmission risk and modifying factors. Of the 7339 abstracts potentially related to per-act HIV transmission risk, 3 meta-analyses provided pooled per-act transmission risk probabilities and 2 studies provided data on modifying factors. Of the 8119 abstracts related to modifying factors, 15 relevant articles, including 3 meta-analyses, were included. We used fixed-effects inverse-variance models on the logarithmic scale to obtain updated estimates of certain transmission risks using data from primary studies, and employed Poisson regression to calculate relative risks with exact 95% confidence intervals for certain modifying factors. RESULTS: Risk of HIV transmission was greatest for blood transfusion, followed by vertical exposure, sexual exposures, and other parenteral exposures. Sexual exposure risks ranged from low for oral sex to 138 infections per 10 000 exposures for receptive anal intercourse. Estimated risks of HIV acquisition from sexual exposure were attenuated by 99.2% with the dual use of condoms and antiretroviral treatment of the HIV-infected partner. CONCLUSION: The risk of HIV acquisition varied widely, and the estimates for receptive anal intercourse increased compared with previous estimates. The risk associated with sexual intercourse was reduced most substantially by the combined use of condoms and antiretroviral treatment of HIV-infected partners. |
Using the National HIV Behavioral Surveillance System to inform HIV prevention efforts in the United States
Paz-Bailey G , Raymond HF , Lansky A , Mermin J . AIDS Behav 2014 18 Suppl 3 S233-6 The National HIV Behavioral Surveillance system (NHBS) was designed to monitor HIV prevalence and risk factors for infection among higher-risk individuals, i.e., sexually active men who have sex with men who attend venues, injection drug users who injected in the past 12 months, and heterosexuals living in low socioeconomic urban areas. These groups were selected as priorities for behavioral surveillance since they represent the major HIV transmission routes and the populations with the highest HIV burden. NHBS contributes to the nation's program of HIV surveillance by being the only multi-site population-based system that provides estimates on key HIV prevention measures among high-risk HIV-negative individuals, HIV-positive individuals unaware of their infection, and HIV-positive individuals aware of their infection who are in and out of care. Accurate and precise data on the behaviors in these populations are critical for tracking the epidemic, planning effective responses, and monitoring and evaluating those responses. Reports in this supplement illustrate the uses of NHBS data at the national and local level and reflect ongoing efforts to improve the system and methods. As we look to the future, behavioral surveillance remains essential for characterizing and monitoring the burden of HIV infection and sexual and behavioral risks. |
Progress along the continuum of HIV care among blacks with diagnosed HIV - United States, 2010
Whiteside YO , Cohen SM , Bradley H , Skarbinski J , Hall HI , Lansky A . MMWR Morb Mortal Wkly Rep 2014 63 (5) 85-9 The goals of the National HIV/AIDS Strategy are to reduce new human immunodeficiency virus (HIV) infections, increase access to care and improve health outcomes for persons living with HIV, and reduce HIV-related health disparities. Recently, by executive order, the HIV Care Continuum Initiative was established, focusing on accelerating federal efforts to increase HIV testing, care, and treatment. Blacks are the racial group most affected, comprising 44% of new infections and also 44% of all persons living with HIV infection. To achieve the goals of NHAS, and to be consistent with the HIV Care Continuum Initiative, blacks with HIV need high levels of care and viral suppression. Achieving these goals calls for 85% of blacks with diagnosed HIV to be linked to care, 80% to be retained in care, and the proportion with an undetectable viral load (VL) to increase 20% by 2015. Analysis of data from the National HIV Surveillance System (NHSS) and the Medical Monitoring Project (MMP) regarding progress along the HIV care continuum during 2010 for blacks with diagnosed HIV infection indicated that 74.9% of HIV-diagnosed blacks were linked to care, 48.0% were retained in care, 46.2% were prescribed antiretroviral therapy (ART), and 35.2% had achieved viral suppression. Black males had lower levels of care and viral suppression than black females at each step along the HIV care continuum; in addition, levels of care and viral suppression for blacks aged <25 years were lower than those for blacks aged ≥25 years at each step of the continuum. These data demonstrate the need for implementation of interventions and public health strategies that increase linkage to care and consistent ART among blacks, particularly black males and black youths. |
Trends in HIV prevalence and HIV testing among young MSM: five United States cities, 1994-2011
Oster AM , Johnson CH , Le BC , Balaji AB , Finlayson TJ , Lansky A , Mermin J , Valleroy L , Mackellar D , Behel S , Paz-Bailey G . AIDS Behav 2013 18 Suppl 3 S237-47 We examined trends in cross-sectional HIV prevalence (a surrogate for incidence) and past 12 month testing behavior among young men who have sex with men (MSM). The Young Men's Survey and the National HIV Behavioral Surveillance System conducted interviews and HIV testing among MSM recruited by venue-based sampling during 1994-2011. Using data from five cities, we determined whether interview year was associated with HIV prevalence and recent testing for MSM ages 18-22 and 23-29 years, after adjusting for city, race/ethnicity, and education. Multivariable analysis demonstrated an overall increase in prevalence among MSM ages 23-29 years, driven by an increase in Baltimore. There was no change in HIV prevalence among MSM ages 18-22 years overall, although prevalence increased in Baltimore. HIV testing increased significantly for both age groups. Gains in HIV testing are encouraging, but increasing prevalence among young MSM in Baltimore suggests increasing incidence and the need for additional efforts for this population. |
Trends in the population prevalence of people who inject drugs in US metropolitan areas 1992-2007
Tempalski B , Pouget ER , Cleland CM , Brady JE , Cooper HL , Hall HI , Lansky A , West BS , Friedman SR . PLoS One 2013 8 (6) e64789 BACKGROUND: People who inject drugs (PWID) have increased risk of morbidity and mortality. We update and present estimates and trends of the prevalence of current PWID and PWID subpopulations in 96 US metropolitan statistical areas (MSAs) for 1992-2007. Current estimates of PWID and PWID subpopulations will help target services and help to understand long-term health trends among PWID populations. METHODOLOGY: We calculated the number of PWID in the US annually from 1992-2007 and apportioned estimates to MSAs using multiplier methods. We used four types of data indicating drug injection to allocate national annual totals to MSAs, creating four distinct series of component estimates of PWID in each MSA and year. The four component estimates are averaged to create the best estimate of PWID for each MSA and year. We estimated PWID prevalence rates for three subpopulations defined by gender, age, and race/ethnicity. We evaluated trends using multi-level polynomial models. RESULTS: PWID per 10,000 persons aged 15-64 years varied across MSAs from 31 to 345 in 1992 (median 104.4) to 34 to 324 in 2007 (median 91.5). Trend analysis indicates that this rate declined during the early period and then was relatively stable in 2002-2007. Overall prevalence rates for non-Hispanic black PWID increased in 2005 as compared to other racial/ethnic groups. Hispanic prevalence, in contrast, declined across time. Importantly, results show a worrisome trend in young PWID prevalence since HAART was initiated - the mean prevalence was 90 to 100 per 10,000 youth in 1992-1996, but increased to >120 PWID per 10,000 youth in 2006-2007. CONCLUSIONS: Overall, PWID rates remained constant since 2002, but increased for two subpopulations: non-Hispanic black PWID and young PWID. Estimates of PWID are important for planning and evaluating public health programs to reduce harm among PWID and for understanding related trends in social and health outcomes. |
Challenges in identifying and estimating undiagnosed HIV infection
Lansky A , Prejean J , Hall I . Future Virol 2013 8 (6) 523-526 In the USA, approximately 18% of the estimated 1.1 million individuals with HIV infection are unaware of their status, although the proportion has decreased somewhat in recent years [101]. HIV testing strategies for reaching the undiagnosed are showing promise, yet a key challenge is that accurate estimates of the proportion of infected individuals remaining undiagnosed are hard to obtain: multiple methods have been used, yet no consensus exists as to the best approach [1]. In order to reduce the proportion of undiagnosed infections, we need to both apply effective testing strategies and identify the best methods for estimation. | Reaching and testing individuals unaware of their infection are critical to the success of HIV prevention in the USA. An estimated 49% of transmissions are from individuals living with HIV unaware of their infection [2]. Individuals with an undiagnosed HIV infection are more likely to transmit the virus to others, since they are more likely to be in the acute infection stage, with a higher infectiousness, and are less likely to take precautions than those who are aware of their status [3,4]. Identifying HIV infection at an early stage among all individuals – not just those with acute HIV infection – is critical for timely linkage to care, initiation of combination antiretroviral therapy when indicated and promotion of adherence to these regimens to reduce morbidity and transmission [5,6]. |
Integrated prevention services for HIV infection, viral hepatitis, sexually transmitted diseases, and tuberculosis for persons who use drugs illicitly: summary guidance from CDC and the U.S. Department of Health and Human Services
Belani H , Chorba T , Fletcher F , Hennessey K , Kroeger K , Lansky A , Leichliter J , Lentine D , Mital S , Needle R , O'Connor K , Oeltmann J , Pevzner E , Purcell D , Sabin M , Semaan S , Sharapov U , Smith B , Vogt T , Wynn BA . MMWR Recomm Rep 2012 61 1-40 This report summarizes current (as of 2011) guidelines or recommendations published by multiple agencies of the U.S. Department of Health and Human Services (DHHS) for prevention and control of human immunodeficiency virus (HIV) infection, viral hepatitis, sexually transmitted diseases (STDs), and tuberculosis (TB) for persons who use drugs illicitly. It also summarizes existing evidence of effectiveness for practices to support delivery of integrated prevention services. Implementing integrated services for prevention of HIV infection, viral hepatitis, STDs, and TB is intended to provide persons who use drugs illicitly with increased access to services, to improve timeliness of service delivery, and to increase effectiveness of efforts to prevent infectious diseases that share common risk factors, behaviors, and social determinants. This guidance is intended for use by decision makers (e.g., local and federal agencies and leaders and managers of prevention and treatment services), health-care providers, social service providers, and prevention and treatment support groups. Consolidated guidance can strengthen efforts of health-care providers and public health providers to prevent and treat infectious diseases and substance use and mental disorders, use resources efficiently, and improve health-care services and outcomes in persons who use drugs illicitly. An integrated approach to service delivery for persons who use drugs incorporates recommended science-based public health strategies, including 1) prevention and treatment of substance use and mental disorders; 2) outreach programs; 3) risk assessment for illicit use of drugs; 4) risk assessment for infectious diseases; 5) screening, diagnosis, and counseling for infectious diseases; 6) vaccination; 7) prevention of mother-to-child transmission of infectious diseases; 8) interventions for reduction of risk behaviors; 9) partner services and contact follow-up; 10) referrals and linkage to care; 11) medical treatment for infectious diseases; and 12) delivery of integrated prevention services. These strategies are science-based, public health strategies to prevent and treat infectious diseases, substance use disorders, and mental disorders. Treatment of infectious diseases and treatment of substance use and mental disorders contribute to prevention of transmission of infectious diseases. Integrating prevention services can increase access to and timeliness of prevention and treatment. |
Respondent driven sampling--where we are and where should we be going?
White RG , Lansky A , Goel S , Wilson D , Hladik W , Hakim A , Frost SD . Sex Transm Infect 2012 88 (6) 397-9 Respondent Driven Sampling (RDS) is a novel variant of link tracing sampling that has primarily been used to estimate the characteristics of hard-to-reach groups, such as the HIV prevalence of drug users.1 ‘Seeds’ are selected by convenience from a population of interest (target population) and given coupons. Seeds then use these coupons to recruit other people, who themselves become recruiters. Recruits are given compensation, usually money, for taking part in the survey and also an incentive for recruiting others. This process continues in recruitment ‘waves’ until the survey is stopped. Estimation methods are then applied to account for the biased recruitment, for example, the presumed over-recruitment of people with more acquaintances, in an attempt to generate estimates for the underlying population. RDS has quickly become popular and relied on by major public health organisations, including the US Centers for Disease Control and Prevention and Family Health International, chiefly because it is often found to be an efficient method of recruitment in hard-to-reach groups, but also because of the availability of custom written software incorporating inference methods that are designed to generate estimates that are representative of the wider population of interest, despite the biased sampling. | As demonstrated by RDS's popularity,1 there was a clear need for new methods of data collection on hard-to-reach groups. However, RDS has not been without its critics. Its reliance on the target population for recruitment introduced ethicalw1 and sampling concerns.w2 If RDS estimates are overly biased or the variance is unacceptably high, then RDS will be little more than another method of convenience sampling. If these errors can be minimised however, then RDS has the potential to become a very useful survey methodology. |
Developing a web-based HIV behavioral surveillance pilot project among men who have sex with men
Sanchez T , Smith A , Denson D , Dinenno E , Lansky A . Open AIDS J 2012 6 224-31 BACKGROUND: A web-based HIV behavioral surveillance system (WHBS) has potential to collect behavioral data from men who have sex with men (MSM) not reached through traditional sampling methods. Six U.S. cities conducted a WHBS pilot in 2005-2007 to determine the feasibility to conduct a behavioral surveillance project entirely on the internet. METHODS: Three sampling methods of adult MSM on the internet were explored: direct marketing (DM) using banner advertisements; respondent-driven sampling (RDS) using peer recruitment; and venue-based sampling (VBS) using internet venues. RESULTS: A total of 8,434 complete MSM surveys were obtained: 8,109 through DM, 130 through RDS, and 195 through VBS. By methods, enrollment rates ranged from 70-90%; completion rates ranged from 67-95%. DM obtained the largest proportions of racial/ethnic minority MSM (36%) and MSM 18-20 years (19%). CONCLUSIONS: Only the DM method achieved a substantial number of complete MSM surveys. Successful implementation of an internet-based systematic sampling method may be problematic, but a convenience sample of MSM using banner advertisements is feasible and may produce useful and timely behavioral information from a large number of MSM. |
Piloting a system for behavioral surveillance among heterosexuals at increased risk of HIV in the United States
DiNenno EA , Oster AM , Sionean C , Denning P , Lansky A . Open AIDS J 2012 6 169-76 OBJECTIVES: During the past decade, the number and proportion of reported HIV cases in the United States acquired through heterosexual contact has increased markedly. CDC employs the National HIV Behavioral Surveillance System (NHBS) to monitor risk behaviors and HIV prevalence in high-risk populations. To identify a target population for conducting NHBS among heterosexuals at increased risk for HIV (NHBS-HET), CDC designed, implemented and evaluated a pilot study. METHODS: The pilot study was conducted in 25 US metropolitan statistical areas in 2006-7. We recruited men and women who reported sex with at least one opposite-sex partner during the past year for a behavioral survey and HIV test. We investigated the relationship between newly diagnosed HIV infection and individual risk behaviors, sexual network characteristics, and social-structural characteristics to arrive at a definition of a heterosexual at increased risk of HIV. RESULTS: Of 14,750 participants in the analysis, 207 (1.4%) had newly diagnosed HIV infection. Using low socioeconomic status (SES) as a criterion for defining a heterosexual at increased risk for HIV resulted in optimal rates of HIV prevalence, specificity, sensitivity and practicality. CONCLUSIONS: Results from the NHBS pilot study underscore the key role of social factors as determinants of HIV infection risk among U.S. heterosexuals, and low SES was incorporated into the definition of a heterosexual at increased risk for HIV in NHBS-HET cycles. Future cycles of NHBS-HET will help tailor prevention programs for those populations most at risk of HIV in the US. |
Internet-based methods may reach higher-risk men who have sex with men not reached through venue-based sampling
Sanchez T , Smith A , Denson D , Dinenno E , Lansky A . Open AIDS J 2012 6 83-9 BACKGROUND: Internet-based sampling methods may reach men who have sex with men (MSM) who don't attend physical venues frequented by MSM and may be at higher risk of HIV infection. METHODS: Multivariate logistic regression was used to examine characteristics of adult MSM participants in 2 studies conducted in the same 5 U.S. cities: the 2003-2005 National HIV Behavioral Surveillance System (NHBS) which used sampling from physical MSM venues (e.g., bars, clubs) and the 2007 Web-based HIV Behavioral Surveillance (WHBS) pilot which used sampling through online banner advertisements. RESULTS: Among 5024 WHBS MSM, 95% attended a physical MSM venue in the past 12 months, and 75% attended weekly. WHBS MSM who were black, aged 18-21 years, not college educated, bisexual- or heterosexual-identifying, and reported unknown HIV serostatus were less likely to have attended a physical MSM venue in the past 12 months (all p<0.01). Compared to NHBS MSM, WHBS MSM were more likely to be white, younger, college-educated, report unknown HIV serostatus, report unprotected anal intercourse with a casual partner, and have first met that partner online (all p<0.0001). WHBS MSM were less likely to have been under the influence of drugs during most recent sex (p=0.01) or not know their sex partner's HIV serostatus (p<0.0001). CONCLUSIONS: Many MSM recruited online also attended physical venues, but attendance varied by sub-group. Participants in WHBS and NHBS differed, and WHBS may represent a group of MSM at higher risk of HIV infection. These findings suggest that an internet-based method may be a useful supplement to NHBS. |
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