Last data update: Sep 16, 2024. (Total: 47680 publications since 2009)
Records 1-7 (of 7 Records) |
Query Trace: Bartley S [original query] |
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Population-based Estimates of COVID-19-like Illness, COVID-19 Illness, and Rates of Case Ascertainment, Hospitalizations, and Deaths - Non-Institutionalized New York City Residents, March-April 2020.
Alroy KA , Crossa A , Dominianni C , Sell J , Bartley K , Sanderson M , Fernandez S , Levanon Seligson A , Lim SW , Wang SM , Dumas SE , Perlman SE , Konty K , Olson DR , Gould LH , Greene SK . Clin Infect Dis 2021 73 (9) 1707-1710 Using a population-based, representative telephone survey, ~930,000 New York City residents had COVID-19 illness beginning March 20-April 30, 2020, a period with limited testing. For every 1000 persons estimated with COVID-19 illness, 141.8 were tested and reported as cases, 36.8 were hospitalized, and 12.8 died, varying by demographic characteristics. |
Finding 'Bright Spots': Using multiple measures to examine local-area racial equity in cancer death outcomes
Scott LC , Bartley S , Dowling NF , Richardson LC . Am J Epidemiol 2020 190 (4) 673-680 The purpose of this study is to present a variety of measures that quantify equity in cancer outcomes, demonstrate how the measures perform in various cancer types, and identify counties, or Bright Spots, that meet the criteria of those measures. Using county-level age adjusted death rates for 2007-2016 from the National Center for Health Statistics, we determined counties that had both equitable and optimal outcomes for the black and white death rates across five cancer types, lung/bronchus, prostate, breast, colorectal, and liver cancers. The number of counties that met the criteria ranged from 0 to 442 depending on cancer type and measure used, and prostate and male liver cancer consistently had the lowest number of Bright Spots with a maximum of 3 counties meeting the most lenient criteria. This study presents several ways to examine equity, using rate ratios and standard error measures, in cancer mortality outcomes. It highlights areas with positive progress towards equity and areas potential need for equity-focused cancer control planning. Examining local areas of positive deviance can inform cancer control programming and planning around health equity. |
Are There Regional Differences in Triple Negative Breast Cancer among Non-Hispanic Black Women?
Bartley SJ , Wu M , Benard V , Ambrosone C , Richardson LC . J Natl Med Assoc 2020 113 (3) 353-356 BACKGROUND: Non-Hispanic black women (NHB) are diagnosed with triple negative breast cancer (TNBC) more often than other ethnic or racial groups in the United States (US). This study describes regional differences in TNBC incidence among NHB women in the US from 2011 to 2015. METHODS: We analyzed data from the United States Cancer Statistics (USCS) that includes incidence data from the Centers for Disease Control and Prevention's National Program of Cancer Registries (NPCR) and the National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) programs. RESULTS: Compared to the incidence rate for NHB women in the South, rates were significantly lower in the Northeast (22.6 per 100,000), higher in the Midwest (25.5 per 100,000) and similar in the West. These regional differences might be explained by genetic admixture among people with different geographic ancestral origins. CONCLUSIONS: Results from this study highlight the need to extend etiological research and evidence-based cancer prevention and control efforts to women at high risk of this disease in order to decrease cancer disparities. |
Are uninsured women in a national screening program having longer intervals between cervical cancer screening tests
Bartley SJ , Benard V , Tai E , Rockwell T , Kenney K , Richardson LC . Prev Med 2020 135 106078 With increased understanding of the natural history of cervical cancer, cervical cancer screening recommendations have evolved (Schiffman & Wentzensen, 2013). As research better quantified the balance of benefits and harms of screening, new recommendations called for longer intervals between screening tests. Adherence to longer screening intervals detects similar numbers of abnormalities and decreases harms associated with overscreening/overtreatment. In this descriptive study, we examined the cervical cancer screening intervals from 2010 to 2018 in the National Breast and Cervical Cancer Early Detection Program (NBCCEDP). There were 1,397,899 women aged 21-64 who were screened for cervical cancer from 2010 to 2018 and 556,743 rescreenings of average risk women were performed. The median cervical screening interval increased from 2.02years in 2010 to 3.88years in 2018. Providers serving uninsured women in a national screening program are following the recommendations of longer intervals between cervical cancer screenings. |
Confidence intervals for asbestos fiber counts: Approximate negative binomial distribution
Bartley D , Slaven J , Harper M . Ann Work Expo Health 2017 61 (2) 237-247 The negative binomial distribution is adopted for analyzing asbestos fiber counts so as to account for both the sampling errors in capturing only a finite number of fibers and the inevitable human variation in identifying and counting sampled fibers. A simple approximation to this distribution is developed for the derivation of quantiles and approximate confidence limits. The success of the approximation depends critically on the use of Stirling’s expansion to sufficient order, on exact normalization of the approximating distribution, on reasonable perturbation of quantities from the normal distribution, and on accurately approximating sums by inverse-trapezoidal integration. Accuracy of the approximation developed is checked through simulation and also by comparison to traditional approximate confidence intervals in the specific case that the negative binomial distribution approaches the Poisson distribution. The resulting statistics are shown to relate directly to early research into the accuracy of asbestos sampling and analysis. Uncertainty in estimating mean asbestos fiber concentrations given only a single count is derived. Decision limits (limits of detection) and detection limits are considered for controlling false-positive and false-negative detection assertions and are compared to traditional limits computed assuming normal distributions. |
An inter-laboratory study to determine the effectiveness of procedures for discriminating amphibole asbestos fibers from amphibole cleavage fragments in fiber counting by phase-contrast microscopy
Harper M , Lee EG , Slaven JE , Bartley DL . Ann Occup Hyg 2012 56 (6) 645-59 The US Occupational Safety and Health Administration (OSHA) and Mine Safety and Health Administration do not regulate cleavage fragments of amphibole and serpentine minerals as asbestos, even when particles meet the dimensional criteria for counting under standard phase-contrast microscopy methods. The OSHA ID-160 method cautions that discriminatory counting is difficult and should not be attempted unless necessary and no procedure is provided for differentiation. A standard published by the American Society for Testing and Materials (ASTM International D7200-06) includes an attempt to codify a procedure but recognizes that the procedure should be validated in an inter-laboratory study. The US National Institute for Occupational Safety and Health has carried out such a study with multiple laboratories using slides made from riebeckite and crocidolite, grunerite and amosite, tremolite and tremolite asbestos, and actinolite and actinolite asbestos using two different measurement aids (graticules). The asbestos fibers had dimensions consistent with those reported for air samples from actual amphibole asbestos operations, and the cleavage fragments were also dimensionally consistent with those found in non-asbestos mining and milling operations. The procedure for discriminating asbestos fibers from other mineral particles in the ASTM Standard calls for the recognition of characteristics supposedly common to asbestos. For the asbestos fibers created in this study, these characteristics were found not to be common and generally a function of length. More importantly, different laboratories did not recognize these features consistently. Laboratories were much more consistent in measuring dimensions, but excessive overlap in the lengths of asbestos fibers and cleavage fragments rendered length a poor criterion for discrimination. The ASTM discrimination procedure as written could not be supported on the basis of this study. Width was a much more consistent parameter for distinguishing the asbestos and non-asbestos fibers in this study and inclusion of aspect ratio, while considered important by some researchers, did not refine the discrimination further. The ability of the majority of microscopists in this study to discriminate fibers and cleavage fragments through measurement of particle widths was determined and found to be within limits of uncertainty typical for air sampling measurements. A width criterion might be a very simple and useful aid where discrimination between asbestos and non-asbestos fibers in fiber counting by phase-contrast microscopy is required for further investigation. Recognition of asbestos features can also be retained as excessive recognition by some laboratories will lead to a conservative decision for additional investigation. |
Interlaboratory evaluation of a standardized inductively coupled plasma mass spectrometry method for the determination of trace beryllium in air filter samples
Ashley K , Brisson MJ , Howe AM , Bartley DL . J Occup Environ Hyg 2009 6 (12) 745-50 A collaborative interlaboratory evaluation of a newly standardized inductively coupled plasma mass spectrometry (ICP-MS) method for determining trace beryllium in workplace air samples was carried out toward fulfillment of method validation requirements for ASTM International voluntary consensus standard test methods. The interlaboratory study (ILS) was performed in accordance with an applicable ASTM International standard practice, ASTM E691, which describes statistical procedures for investigating interlaboratory precision. Uncertainty was also estimated in accordance with ASTM D7440, which applies the International Organization for Standardization Guide to the Expression of Uncertainty in Measurement to air quality measurements. Performance evaluation materials (PEMs) used consisted of 37 mm diameter mixed cellulose ester filters that were spiked with beryllium at levels of 0.025 (low loading), 0.5 (medium loading), and 10 (high loading) microg Be/filter; these spiked filters were prepared by a contract laboratory. Participating laboratories were recruited from a pool of over 50 invitees; ultimately, 20 laboratories from Europe, North America, and Asia submitted ILS results. Triplicates of each PEM (blanks plus the three different loading levels) were conveyed to each volunteer laboratory, along with a copy of the draft standard test method that each participant was asked to follow; spiking levels were unknown to the participants. The laboratories were requested to prepare the PEMs by one of three sample preparation procedures (hotplate or microwave digestion or hotblock extraction) that were described in the draft standard. Participants were then asked to analyze aliquots of the prepared samples by ICP-MS and to report their data in units of mu g Be/filter sample. Interlaboratory precision estimates from participating laboratories, computed in accordance with ASTM E691, were 0.165, 0.108, and 0.151 (relative standard deviation) for the PEMs spiked at 0.025, 0.5, and 10 microg Be/filter, respectively. Overall recoveries were 93.2%, 102%, and 80.6% for the low, medium, and high beryllium loadings, respectively. Expanded uncertainty estimates for interlaboratory analysis of low, medium, and high beryllium loadings, calculated in accordance with ASTM D7440, were 18.8%, 19.8%, and 24.4%, respectively. These figures of merit support promulgation of the analytical procedure as an ASTM International standard test method, ASTM D7439. |
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