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Prospective Cohort Study of Uterine Fibroids and Miscarriage Risk.
Hartmann KE, Velez Edwards DR, Savitz DA, Jonsson-Funk ML, Wu P, Sundermann AC, Baird DD
(2017) Am J Epidemiol 186: 1140-1148
MeSH Terms: Abortion, Spontaneous, Adult, Comorbidity, Confidence Intervals, Confounding Factors, Epidemiologic, Female, Humans, Interviews as Topic, Leiomyoma, Medical History Taking, North Carolina, Pregnancy, Pregnancy Trimester, First, Proportional Hazards Models, Prospective Studies, Reproductive History, Tennessee, Texas, Ultrasonography, Young Adult
Show Abstract · Added February 21, 2019
We sought to determine the relationship of fibroids to pregnancy loss in a prospective cohort in which fibroid status was uniformly documented in early pregnancy. Participants had an intake interview, transvaginal ultrasonography, computer-assisted telephone interview, and follow-up assessment of outcomes. We recruited diverse participants for the Right From the Start study from 8 metropolitan areas in 3 states in the United States during 2000-2012. Participants were at least 18 years of age, trying to become pregnant or at less than 12 weeks' gestation, not using fertility treatments, fluent in English or Spanish, and available for telephone interviews. Miscarriage was defined as loss before 20 weeks' gestation. Fibroid presence, number, type, and volume were assessed using standardized ultrasonography methods. We used proportional hazards models to estimate associations. Among 5,512 participants, 10.4% had at least 1 fibroid, and 10.8% experienced a miscarriage. Twenty-three percent had experienced a prior miscarriage and 52% prior births. Presence of fibroids was associated with miscarriage in models without adjustments. Adjusting for key confounders indicated no increase in risk (adjusted hazard ratio = 0.83, 95% confidence interval: 0.63, 1.08). No characteristic of fibroids was associated with risk. Prior evidence attributing miscarriage to fibroids is potentially biased. These findings imply that surgical removal of fibroids to reduce risk of miscarriage deserves careful scrutiny.
© The Author(s) 2017. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
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Geographic Variations in Retention in Care among HIV-Infected Adults in the United States.
Rebeiro PF, Gange SJ, Horberg MA, Abraham AG, Napravnik S, Samji H, Yehia BR, Althoff KN, Moore RD, Kitahata MM, Sterling TR, Curriero FC, North American AIDS Cohort Collaboration on Research and Design (NA-ACCORD)
(2016) PLoS One 11: e0146119
MeSH Terms: Adult, Confidence Intervals, Demography, Geography, HIV Infections, Humans, Middle Aged, Odds Ratio, Patient Care, Time Factors, United States
Show Abstract · Added February 17, 2016
OBJECTIVE - To understand geographic variations in clinical retention, a central component of the HIV care continuum and key to improving individual- and population-level HIV outcomes.
DESIGN - We evaluated retention by US region in a retrospective observational study.
METHODS - Adults receiving care from 2000-2010 in 12 clinical cohorts of the North American AIDS Cohort Collaboration on Research and Design (NA-ACCORD) contributed data. Individuals were assigned to Centers for Disease Control and Prevention (CDC)-defined regions by residential data (10 cohorts) and clinic location as proxy (2 cohorts). Retention was ≥2 primary HIV outpatient visits within a calendar year, >90 days apart. Trends and regional differences were analyzed using modified Poisson regression with clustering, adjusting for time in care, age, sex, race/ethnicity, and HIV risk, and stratified by baseline CD4+ count.
RESULTS - Among 78,993 adults with 444,212 person-years of follow-up, median time in care was 7 years (Interquartile Range: 4-9). Retention increased from 2000 to 2010: from 73% (5,000/6,875) to 85% (7,189/8,462) in the Northeast, 75% (1,778/2,356) to 87% (1,630/1,880) in the Midwest, 68% (8,451/12,417) to 80% (9,892/12,304) in the South, and 68% (5,147/7,520) to 72% (6,401/8,895) in the West. In adjusted analyses, retention improved over time in all regions (p<0.01, trend), although the average percent retained lagged in the West and South vs. the Northeast (p<0.01).
CONCLUSIONS - In our population, retention improved, though regional differences persisted even after adjusting for demographic and HIV risk factors. These data demonstrate regional differences in the US which may affect patient care, despite national care recommendations.
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The impact of stage, grade, and mucinous histology on the efficacy of systemic chemotherapy in adenocarcinomas of the appendix: Analysis of the National Cancer Data Base.
Asare EA, Compton CC, Hanna NN, Kosinski LA, Washington MK, Kakar S, Weiser MR, Overman MJ
(2016) Cancer 122: 213-21
MeSH Terms: Adenocarcinoma, Adenocarcinoma, Mucinous, Adult, Aged, Appendectomy, Appendiceal Neoplasms, Chemotherapy, Adjuvant, Cohort Studies, Confidence Intervals, Disease-Free Survival, Female, Humans, Kaplan-Meier Estimate, Male, Middle Aged, Neoplasm Grading, Neoplasm Invasiveness, Neoplasm Staging, Odds Ratio, Proportional Hazards Models, Registries, Retrospective Studies, Survival Analysis, Treatment Outcome
Show Abstract · Added February 22, 2016
BACKGROUND - Adenocarcinomas of the appendix represent a heterogeneous disease depending on the presence of mucinous histology, histologic grade, and stage. In the current study, the authors sought to explore the interplay of these factors with systemic chemotherapy in a large population data set.
METHODS - Patients in the National Cancer Data Base (NCDB) who were diagnosed with mucinous, nonmucinous, and signet ring cell-type appendiceal neoplasms from 1985 through 2006 were selected. Multivariable Cox proportional hazards regression models were developed.
RESULTS - A total of 11,871 patients met the inclusion criteria for the current study: 50.3% had mucinous neoplasms, 40.5% had nonmucinous neoplasms, and 9.2% had signet ring cell-type neoplasms. The 5-year overall survival (OS) stratified by grade was similar among patients with American Joint Committee on Cancer stage I to stage III disease but not for those with stage IV disease. The median OS for patients with stage IV mucinous and nonmucinous tumors was 6.4 years and 2.3 years, respectively, for those with well differentiated histology (P<.0001) and was 1.5 years and 0.8 years, respectively, for those with poorly differentiated histology (P<.0001). In multivariable modeling for stage I to III disease, adjuvant chemotherapy improved OS for both mucinous and nonmucinous histologies, with hazard ratios (HRs) of 0.78 (95% confidence interval [95% CI], 0.68-0.89 [P = .0002]) and 0.83 (95% CI, 0.74-0.94 [P = .002]), respectively. For patients with stage IV disease, systemic chemotherapy significantly improved OS for those with nonmucinous (HR, 0.72; 95% CI, 0.64-0.82 [P<.0001]) but not mucinous (HR, 0.95; 95% CI, 0.86-1.04 [P = .2) histologies, although this was grade-dependent. The median OS for chemotherapy versus no chemotherapy was 6.4 years versus 6.5 years (P value not significant) for patients with mucinous, well-differentiated tumors and 1.6 years versus 1.0 years (P = .0007) for patients with mucinous, poorly differentiated tumors.
CONCLUSIONS - Adjuvant chemotherapy demonstrated a significant OS benefit regardless of histology. However, for patients with stage IV disease, the benefit of systemic chemotherapy varied by tumor histology and grade, with patients with well-differentiated, mucinous, appendiceal adenocarcinomas deriving no survival benefit from systemic chemotherapy. Cancer 2016;122:213-221. © 2015 American Cancer Society.
© 2015 American Cancer Society.
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Occupational Lead Exposure and Associations with Selected Cancers: The Shanghai Men's and Women's Health Study Cohorts.
Liao LM, Friesen MC, Xiang YB, Cai H, Koh DH, Ji BT, Yang G, Li HL, Locke SJ, Rothman N, Zheng W, Gao YT, Shu XO, Purdue MP
(2016) Environ Health Perspect 124: 97-103
MeSH Terms: Adult, Aged, China, Confidence Intervals, Female, Humans, Lead, Male, Meningioma, Middle Aged, Occupational Exposure, Proportional Hazards Models, Prospective Studies
Show Abstract · Added May 4, 2017
BACKGROUND - Epidemiologic studies of occupational lead exposure have suggested increased risks of cancers of the stomach, lung, kidney, brain, and meninges; however, the totality of the evidence is inconsistent.
OBJECTIVE - We investigated the relationship between occupational lead exposure and cancer incidence at the five abovementioned sites in two prospective cohorts in Shanghai, China.
METHODS - Annual job/industry-specific estimates of lead fume and lead dust exposure, derived from a statistical model combining expert lead intensity ratings with inspection measurements, were applied to the lifetime work histories of participants from the Shanghai Women's Health Study (SWHS; n = 73,363) and the Shanghai Men's Health Study (SMHS; n = 61,379) to estimate cumulative exposure to lead fume and lead dust. These metrics were then combined into an overall occupational lead exposure variable. Cohort-specific relative hazard rate ratios (RRs) and 95% confidence intervals (CIs) comparing exposed and unexposed participants were estimated using Cox proportional hazards regression and combined by meta-analysis.
RESULTS - The proportions of SWHS and SMHS participants with estimated occupational lead exposure were 8.9% and 6.9%, respectively. Lead exposure was positively associated with meningioma risk in women only (n = 38 unexposed and 9 exposed cases; RR = 2.4; 95% CI: 1.1, 5.0), particularly with above-median cumulative exposure (RR = 3.1; 95% CI: 1.3, 7.4). However, all 12 meningioma cases among men were classified as unexposed to lead. We also observed non-significant associations with lead exposure for cancers of the kidney (n = 157 unexposed and 17 ever exposed cases; RR = 1.4; 95% CI: 0.9, 2.3) and brain (n = 67 unexposed and 10 ever exposed cases; RR = 1.8; 95% CI: 0.7, 4.8) overall.
CONCLUSIONS - Our findings, though limited by small numbers of cases, suggest that lead is associated with the risk of several cancers in women and men.
CITATION - Liao LM, Friesen MC, Xiang YB, Cai H, Koh DH, Ji BT, Yang G, Li HL, Locke SJ, Rothman N, Zheng W, Gao YT, Shu XO, Purdue MP. 2016. Occupational lead exposure and associations with selected cancers: the Shanghai Men's and Women's Health Study cohorts. Environ Health Perspect 124:97-103; http://dx.doi.org/10.1289/ehp.1408171.
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Nationwide trends in mastectomy for early-stage breast cancer.
Kummerow KL, Du L, Penson DF, Shyr Y, Hooks MA
(2015) JAMA Surg 150: 9-16
MeSH Terms: Adult, Age Factors, Aged, Breast Neoplasms, Cohort Studies, Confidence Intervals, Databases, Factual, Early Detection of Cancer, Female, Humans, Incidence, Logistic Models, Mammaplasty, Mastectomy, Mastectomy, Segmental, Middle Aged, Multivariate Analysis, Neoplasm Invasiveness, Neoplasm Staging, Odds Ratio, Prognosis, Retrospective Studies, Risk Assessment, Survival Analysis, United States
Show Abstract · Added February 19, 2015
IMPORTANCE - Accredited breast centers in the United States are measured on performance of breast conservation surgery (BCS) in the majority of women with early-stage breast cancer. Prior research in regional and limited national cohorts suggests a recent shift toward increasing performance of mastectomy in patients eligible for BCS.
OBJECTIVE - To examine whether mastectomy rates in patients eligible for BCS are increasing over time nationwide, and are associated with coincident increases in breast reconstruction and bilateral mastectomy for unilateral disease.
DESIGN, SETTING, AND PARTICIPANTS - We performed a retrospective cohort study of temporal trends in performance of mastectomy for early-stage breast cancer using multivariable logistic regression modeling to adjust for pertinent covariates and interactions. We studied more than 1.2 million adult women treated at centers accredited by the American Cancer Society and the American College of Surgeons Commission on Cancer from January 1, 1998, to December 31, 2011, using the National Cancer Data Base.
EXPOSURES - Year of breast cancer diagnosis.
MAIN OUTCOMES AND MEASURES - Proportion of women with early-stage breast cancer who underwent mastectomy. Secondary outcome measures include temporal trends in breast reconstruction and bilateral mastectomy for unilateral disease.
RESULTS - A total of 35.5% of the study cohort underwent mastectomy. The adjusted odds of mastectomy in BCS-eligible women increased 34% during the most recent 8 years of the cohort, with an odds ratio of 1.34 (95% CI, 1.31-1.38) in 2011 relative to 2003. Rates of increase were greatest in women with clinically node-negative disease (odds ratio, 1.38; 95% CI, 1.34-1.41) and in situ disease (odds ratio, 2.05; 95% CI, 1.95-2.15). In women undergoing mastectomy, rates of breast reconstruction increased from 11.6% in 1998 to 36.4% in 2011 (P < .001 for trend). Rates of bilateral mastectomy for unilateral disease increased from 1.9% in 1998 to 11.2% in 2011 (P < .001).
CONCLUSIONS AND RELEVANCE - In the past decade, there have been marked trends toward higher proportions of BCS-eligible patients undergoing mastectomy, breast reconstruction, and bilateral mastectomy. The greatest increases are seen in women with node-negative and in situ disease. Mastectomy rates do not yet exceed current American Cancer Society/American College of Surgeons Commission on Cancer accreditation benchmarks. Further research is needed to understand factors associated with these trends and their implications for performance measurement in American Cancer Society/American College of Surgeons Commission on Cancer centers.
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Obstructive sleep apnea and progression of coronary artery calcium: the multi-ethnic study of atherosclerosis study.
Kwon Y, Duprez DA, Jacobs DR, Nagayoshi M, McClelland RL, Shahar E, Budoff M, Redline S, Shea S, Carr JJ, Lutsey PL
(2014) J Am Heart Assoc 3: e001241
MeSH Terms: Age Factors, Aged, Aged, 80 and over, Calcinosis, Cholesterol, HDL, Cholesterol, LDL, Cohort Studies, Confidence Intervals, Coronary Angiography, Coronary Artery Disease, Disease Progression, Female, Follow-Up Studies, Humans, Male, Middle Aged, Polysomnography, Predictive Value of Tests, Prospective Studies, Risk Assessment, Sex Factors, Sleep Apnea, Obstructive, Time Factors
Show Abstract · Added October 10, 2014
BACKGROUND - Obstructive sleep apnea (OSA) is a common condition associated with cardiovascular disease. Its potential effect on progression of subclinical atherosclerosis is not well understood. We tested the hypothesis that self-reported OSA is associated with progression of coronary artery calcium (CAC). We also evaluated whether traditional cardiovascular risk factors accounted for the association.
METHODS AND RESULTS - In the Multi-Ethnic Study of Atherosclerosis (MESA) prospective cohort, we studied 2603 participants who at baseline (2002-2004) completed a sleep questionnaire and underwent coronary computed tomography (CT) and, then 8 years later (2010-2011), a repeat coronary CT. Participants were categorized by symptoms of habitual snoring or reported physician diagnosis of OSA. At baseline, 102 (3.9%) reported diagnosed OSA; 666 (25.6%) reported diagnosed habitual snoring; and 1835 (70.5%) reported neither habitual snoring nor OSA ("normal"). At baseline, CAC prevalence was highest among those with OSA but similar for those with and without habitual snoring. During 8 years of follow-up, greater progression of CAC was observed among those with OSA versus normal (mean increase of 204.2 versus 135.5 Agatston units; P=0.01), after accounting for demographics, behaviors, and body habitus. Modest attenuation was observed after adjustment for cardiovascular risk factors (188.7 versus 138.8; P=0.06). CAC progression among habitual snorers was similar to that observed in the normal group.
CONCLUSIONS - OSA was associated with CAC score progression after adjustment for demographics, behaviors, and body mass index. However, the association was not significant after accounting for cardiovascular risk factors, which may mediate the association between OSA and CAC.
© 2014 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley Blackwell.
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Clinical characteristics and outcomes associated with the natural history of early repolarization in a young, biracial cohort followed to middle age: the Coronary Artery Risk Development in Young Adults (CARDIA) study.
Ilkhanoff L, Soliman EZ, Prineas RJ, Walsh JA, Ning H, Liu K, Carr JJ, Jacobs DR, Lloyd-Jones DM
(2014) Circ Arrhythm Electrophysiol 7: 392-9
MeSH Terms: Adult, African Continental Ancestry Group, Age Factors, Arrhythmias, Cardiac, Brugada Syndrome, Cardiac Conduction System Disease, Cardiovascular Diseases, Cause of Death, Cohort Studies, Confidence Intervals, Echocardiography, Electrocardiography, European Continental Ancestry Group, Female, Follow-Up Studies, Heart Conduction System, Humans, Kaplan-Meier Estimate, Male, Middle Aged, Proportional Hazards Models, Prospective Studies, Risk Assessment, Sex Factors, Survival Rate, Time Factors, Young Adult
Show Abstract · Added October 10, 2014
BACKGROUND - Early repolarization (ER), a common electrocardiographic phenotype, has been associated with increased mortality risk in middle-aged adults. Data are sparse on long-term follow-up and outcomes associated with ER in younger adults.
METHODS AND RESULTS - We prospectively examined 5039 participants (mean age, 25 years at baseline, 40% black) from the Coronary Artery Disease Risk in Adults (CARDIA) cohort for 23 years. Twelve-lead ECGs were recorded and analyzed at years 0, 7, and 20 and coded as definite or probable ER using a standardized algorithm. Cox regression was used, and models were adjusted for important baseline and clinical covariates. Kaplan-Meier curves were created for presence of ER and total mortality and cardiovascular mortality. Participants with ER were more likely to be black, male, smoke, have higher systolic blood pressure, lower heart rate and body mass index, higher exercise duration, and longer PR, QRS, and QT intervals. ER was associated with total mortality (hazard ratio, 1.77; confidence interval, 1.38-2.28; P<0.01) and cardiovascular mortality (hazard ratio, 1.59; confidence interval, 1.01-2.50; P=0.04) in unadjusted analyses, but adjustment for age, sex, and race attenuated associations almost completely. Sex-race stratified analyses showed no significant associations between ER and outcome for any of the subgroups except blacks.
CONCLUSIONS - The presence of ER at any time point during 23 years of follow-up was not associated with adverse outcomes. Black race and male sex confound the unadjusted association of ER and outcomes, with no race-sex interactions noted. Additional studies are necessary to understand the factors associated with heightened risk of death in those who maintain ER into and beyond middle age.
© 2014 American Heart Association, Inc.
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Transient ischemic attack requiring hospitalization of children in the United States: kids' inpatient database 2003 to 2009.
Adil MM, Qureshi AI, Beslow LA, Jordan LC
(2014) Stroke 45: 887-8
MeSH Terms: Adolescent, Age Factors, Brain Ischemia, Child, Child, Preschool, Confidence Intervals, Databases, Factual, Female, Hospitalization, Humans, Infant, Ischemic Attack, Transient, Length of Stay, Male, Regression Analysis, Risk Factors, Stroke, United States
Show Abstract · Added March 24, 2020
BACKGROUND AND PURPOSE - Transient ischemic attacks (TIA) are not well described in children. We assessed the prevalence of risk factors for TIA requiring hospitalization in children in a large national database.
METHODS - Using the Healthcare Cost and Utilization Project Kids' Inpatient Database, children aged 1 to 18 years admitted for TIA in 2003, 2006, and 2009 were identified by International Classification of Diseases, Ninth Revision, Clinical Modification code 435. Descriptive analyses identified patient characteristics. Trend analysis determined the change in annual average hospitalization days from 2003 to 2009.
RESULTS - TIA was the primary diagnosis for 531 children. Important secondary diagnoses included sickle cell disease (20%), congenital heart disease (11%), migraine (12%), moyamoya disease (10%), and stroke (4%). Mean length of stay decreased from 3.0 days (95% confidence interval, 2.4-3.6) in 2003 to 2.3 days (95% confidence interval, 2.0-2.7) in 2009 (P=0.04). During the same period, 2590 children were admitted with ischemic stroke; 4.8 children with stroke were admitted for every child with TIA.
CONCLUSIONS - Recognized risk factors for TIA, including sickle cell disease, congenital heart disease, moyamoya, recent stroke, and migraine, were present in <60% of children. Pediatric admissions for ischemic stroke were ≈5-fold more common than for TIA. Further study is required to understand the risk of stroke after TIA in children to guide appropriate evaluation and treatment.
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Uterine leiomyomata and cesarean birth risk: a prospective cohort with standardized imaging.
Michels KA, Velez Edwards DR, Baird DD, Savitz DA, Hartmann KE
(2014) Ann Epidemiol 24: 122-6
MeSH Terms: Adult, Body Mass Index, Cesarean Section, Confidence Intervals, Female, Humans, Labor, Obstetric, Leiomyoma, North Carolina, Obstetric Labor Complications, Predictive Value of Tests, Pregnancy, Pregnancy Complications, Neoplastic, Prevalence, Prospective Studies, Risk Factors, Tennessee, Texas, Ultrasonography, Prenatal, Uterine Neoplasms
Show Abstract · Added March 5, 2014
PURPOSE - To determine if women with leiomyomata detected using uniform ultrasound methods are at increased risk of cesarean birth, without regard to indication.
METHODS - Women were enrolled in Right from the Start (2000-2010), a prospective pregnancy cohort. Leiomyomata were counted, categorized, and measured during first trimester ultrasounds. Women provided information about demographics and reproductive history during first trimester interviews. Route of delivery was extracted from medical records or vital records, if the former were unavailable. Generalized estimating equations were used to calculate risk ratios (RR) and 95% confidence intervals (CIs) for the risk of cesarean birth by leiomyoma presence and characteristics.
RESULTS - Among 2635 women, the prevalences of leiomyomata and cesarean birth were 11.2% and 29.8%, respectively. Women with leiomyomata, compared with those without, had a 27% increase in cesarean risk (RR, 1.27; CI, 1.17-1.37). The association was weaker following adjustment for maternal body mass index and age (adjusted risk ratio [ARR], 1.11; CI, 1.02-1.20). The adjusted risk was elevated for women with a single leiomyoma 3 cm or more in diameter (ARR, 1.22; CI, 1.14-1.32) and women with the largest total leiomyoma volumes (ARR, 1.59; CI, 1.44-1.76).
CONCLUSIONS - Women with leiomyomata were at increased risk for cesarean birth particularly, those with larger tumor volumes.
Copyright © 2014 Elsevier Inc. All rights reserved.
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Predictors of regional variations in hospitalizations following emergency department visits for atrial fibrillation.
Barrett TW, Self WH, Jenkins CA, Storrow AB, Heavrin BS, McNaughton CD, Collins SP, Goldberger JJ
(2013) Am J Cardiol 112: 1410-6
MeSH Terms: Atrial Fibrillation, Confidence Intervals, Cross-Sectional Studies, Emergency Service, Hospital, Hospitalization, Humans, Odds Ratio, Patient Readmission, Prognosis, Risk Factors, United States
Show Abstract · Added January 20, 2015
The emergency department (ED) is often where atrial fibrillation (AF) is first detected and acutely treated and affected patients dispositioned. We used the Nationwide Emergency Department Sample to estimate the percentage of visits resulting in hospitalization and investigate associations between patient and hospital characteristics with hospitalization at the national and regional levels. We conducted a cross-sectional study of adults with AF listed as the primary ED diagnosis in the 2007 to 2009 Nationwide Emergency Department Sample. We performed multivariate logistic regression analyses investigating the associations between prespecified patient and hospital characteristics with hospitalization. From 2007 to 2009, there were 1,320,123 weighted ED visits for AF, with 69% hospitalized nationally. Mean regional hospitalization proportions were: Northeast (74%), Midwest (68%), South (74%), and West (57%). The highest odds ratios for predicting hospitalization were heart failure (3.85, 95% confidence interval [CI] 3.66 to 4.02), chronic obstructive pulmonary disease (2.47, 95% CI 2.34 to 2.61), and coronary artery disease (1.65, 95% CI 1.58 to 1.73). After adjusting for age, privately insured (0.77, 95% CI 0.73 to 0.81) and self-pay (0.77 95% CI 0.66 to 0.90) patients had lower odds compared with Medicare recipients, whereas Medicaid (1.21, 95% CI 1.11 to 1.32) patients tended to have higher odds. Patients living in low-income zip codes (1.18, 95% CI 1.12 to 1.25) and patients treated at large metropolitan hospitals (1.75, 95% CI 1.59 to 1.93) had higher odds. In conclusion, our analysis showed considerable regional variation in the management of patients with AF in the ED and in associations between patient socioeconomic and hospital characteristics with ED disposition; adapting best practices from among these variations in management could reduce hospitalizations and health-care expenses.
Copyright © 2013 Elsevier Inc. All rights reserved.
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