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American Journal of Epidemiology

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https://www.readbyqxmd.com/read/28338983/multi-site-clinical-assessment-of-myalgic-encephalomyelitis-chronic-fatigue-syndrome-mcam-design-and-implementation-of-a-prospective-retrospective-rolling-cohort-study
#1
Elizabeth R Unger, Jin-Mann S Lin, Hao Tian, Benjamin H Natelson, Gudrun Lange, Diana Vu, Michelle Blate, Nancy G Klimas, Elizabeth G Balbin, Lucinda Bateman, Ali Allen, Charles W Lapp, Wendy Springs, Andreas M Kogelnik, Catrina C Phan, Joan Danver, Richard N Podell, Trisha Fitzpatrick, Daniel L Peterson, C Gunnar Gottschalk, Mangalathu S Rajeevan
In the Multi-Site Clinical Assessment of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (MCAM), we relied on expert clinician diagnoses to enroll patients from 7 specialty clinics in the United States in order to perform a systematic collection of data on measures of myalgic encephalomyelitis (ME)/chronic fatigue syndrome (CFS). Healthy persons and those with other illnesses that share some features with ME/CFS were enrolled in comparison groups. The major objectives were to: 1) use standardized questionnaires to measure illness domains of ME/CFS and to evaluate patient heterogeneity overall and between clinics; 2) describe the course of illness, identify the measures that best correlate with meaningful clinical differences, and assess the performances of questionnaires as patient/person-reported outcome measures; 3) describe prescribed medications, orders for laboratory and other tests, and management tools used by expert clinicians to care for persons with ME/CFS; 4) collect biospecimens for future hypothesis testing and for evaluation of morning cortisol profiles; and 5) identify measures that best distinguish persons with ME/CFS from those in the comparison groups and detect subgroups of persons with ME/CFS who may have different underlying causes...
March 17, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338946/instrumental-variable-methods-for-continuous-outcomes-that-accommodate-nonignorable-missing-baseline-values
#2
Ashkan Ertefaie, James H Flory, Sean Hennessy, Dylan S Small
Instrumental variable (IV) methods provide unbiased treatment effect estimation in the presence of unmeasured confounders under certain assumptions. To provide valid estimates of treatment effect, treatment effect confounders that are associated with the IV (IV-confounders) must be included in the analysis, and not including observations with missing values may lead to bias. Missing covariate data are particularly problematic when the probability that a value is missing is related to the value itself, which is known as nonignorable missingness...
March 16, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338905/the-reverse-j-shaped-association-between-serum-total-25-hydroxyvitamin-d-concentration-and-all-cause-mortality-the-impact-of-assay-standardization
#3
Ramón A Durazo-Arvizu, Bess Dawson-Hughes, Holly Kramer, Guichan Cao, Joyce Merkel, Paul M Coates, Christopher T Sempos
We evaluated the impact of standardizing the originally measured serum total 25-hydroxyvitamin D (25(OH)D) values from Third National Health and Nutrition Examination Survey (NHANES III, 1988-1994) on the association between 25(OH)D and rate of all-cause mortality. Values were standardized to the gold-standard laboratory method. Follow-up from 1990-2006 consisted of 15,099 participants aged at least 20 years at baseline, among whom there were 3,784 deaths. Relative risk of death was adjusted for age, sex, race/ethnicity, and season using Poisson regression...
March 15, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338902/assessment-of-the-status-of-measles-elimination-in-the-united-states-2001-2014
#4
Paul A Gastañaduy, Prabasaj Paul, Amy Parker Fiebelkorn, Susan B Redd, Ben A Lopman, Manoj Gambhir, Gregory S Wallace
We assessed the status of measles elimination in the United States using outbreak notification data. Measles transmissibility was assessed by estimation of the reproduction number, R, the average number of secondary cases per infection, using 4 methods; elimination requires maintaining R at <1. Method 1 estimates R as 1 minus the proportion of cases that are imported. Methods 2 and 3 estimate R by fitting a model of the spread of infection to data on the sizes and generations of chains of transmission, respectively...
March 15, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338886/re-residential-proximity-to-traffic-related-pollution-and-atherosclerosis-in-4-vascular-beds-among-african-american-adults-results-from-the-jackson-heart-study
#5
https://www.readbyqxmd.com/read/28338972/wilkinson-et-al-respond-to-latent-transition-analyses-in-clinical-cohorts
#6
Anna L Wilkinson, Carol El-Hayek, Christopher K Fairley, Norm Roth, B K Tee, Emma McBryde, Margaret Hellard, Mark Stoové
No abstract text is available yet for this article.
March 10, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338951/measuring-transitions-in-sexual-risk-among-men-who-have-sex-with-men-the-novel-use-of-latent-class-and-latent-transition-analysis-in-hiv-sentinel-surveillance
#7
Anna L Wilkinson, Carol El-Hayek, Christopher K Fairley, Norm Roth, B K Tee, Emma McBryde, Margaret Hellard, Mark Stoové
New combination human acquired deficiency (HIV) prevention strategies that include biomedical and primary prevention approaches add complexity to the task of measuring sexual risk. Latent transition models are beneficial for understanding complex phenomena; therefore, we trialed the application of latent class and latent transition models to HIV surveillance data. Our aims were to identify sexual risk states and model individuals' transitions between states. A total of 4,685 HIV-negative men who have sex with men (MSM) completed behavioral questionnaires alongside tests for HIV and sexually transmissible infections at one of 2 Melbourne, Victoria, Australia, general practices (2007-2013)...
March 10, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338912/invited-commentary-the-tao-of-clinical-cohort-analysis-when-the-transitions-that-can-be-spoken-of-are-not-the-true-transitions
#8
Stephen J Mooney
Patterns in risk-related behaviors identified using clinically deployed surveys may hold value for public health surveillance. However, because such surveys assess subjects only when subjects choose to visit clinics, clinical data are subject to variability in observation patterns that is not present in conventional longitudinal data sets in which research teams contact subjects at regular intervals. In this issue of the Journal, Wilkinson et al. (Am J Epidemiol. 2017;000(00):000-000) describe how they applied a latent transition analysis technique to surveillance data collected during clinic visits...
March 10, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338925/tobacco-use-oral-health-and-risk-of-parkinson-s-disease
#9
Zhiwei Liu, Ann Roosaar, Tony Axéll, Weimin Ye
Few studies have investigated the associations between use of Swedish moist snuff (snus), associated poor oral health, and risk of Parkinson's disease (PD). We followed 20,175 participants who were free of PD in 1973-1974 in Uppsala, Sweden, until the end of 2012. We used Cox proportional hazards regression models to estimate hazard ratios and corresponding 95% confidence intervals for the associations between tobacco use, oral health indicators, and PD risk. We found that tobacco use was associated with a lower risk of PD in males...
March 9, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338922/the-hidden-epidemic-of-firearm-injury-increasing-firearm-injury-rates-during-2001-2013
#10
Bindu Kalesan, Chandana Adhikarla, Joyce C Pressley, Jeffrey A Fagan, Ziming Xuan, Michael B Siegel, Sandro Galea
Investigating firearm injury trends over the past decade, we examined temporal trends overall and according to race/ethnicity and intent in fatal and nonfatal firearm injuries (FFIs and NFIs) in United States during 2001-2013. Counts of FFIs and estimated counts of NFIs were obtained from the Centers for Disease Control and Prevention's Web-based Injury Statistics Query and Reporting System. Poisson regression was used to analyze overall and subgroup temporal trends and to estimate annual change per 100,000 persons (change)...
March 6, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338910/the-dry-run-analysis-a-method-for-evaluating-risk-scores-for-confounding-control
#11
Richard Wyss, Ben B Hansen, Alan R Ellis, Joshua J Gagne, Rishi J Desai, Robert J Glynn, Til Stürmer
A propensity score (PS) model's ability to control confounding can be assessed by evaluating covariate balance across exposure groups after PS adjustment. The optimal strategy for evaluating a disease risk score (DRS) model's ability to control confounding is less clear. DRS models cannot be evaluated through balance checks within the full population, and they are usually assessed through prediction diagnostics and goodness-of-fit tests. A proposed alternative is the "dry-run" analysis, which divides the unexposed population into "pseudo-exposed" and "pseudo-unexposed" groups so that differences on observed covariates resemble differences between the actual exposed and unexposed populations...
March 6, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338878/risk-of-diabetes-after-hysterectomy-with-or-without-oophorectomy-in-postmenopausal-women
#12
Juhua Luo, JoAnn E Manson, Rachel Peragallo Urrutia, Michael Hendryx, Erin S LeBlanc, Karen L Margolis
The aim of this study was to determine the associations between hysterectomy, bilateral salpingo-oophorectomy (BSO), and incidence of diabetes in postmenopausal women participating in the Women's Health Initiative (WHI), a series of trials conducted in the United States, during the period 1993-1998. A total of 67,130 postmenopausal women aged 50-79 years were followed for a mean of 13.4 years. Among them, 7,430 cases of diabetes were diagnosed. Multivariable Cox proportional hazards models were used to assess the association between hysterectomy/oophorectomy status and diabetes incidence...
March 6, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338812/association-between-age-at-menarche-and-gestational-diabetes-mellitus-the-australian-longitudinal-study-on-women-s-health
#13
Danielle A J M Schoenaker, Gita D Mishra
In this study, we aimed to examine the association between age at menarche and gestational diabetes mellitus (GDM). Data were from 4,749 women participating in the Australian Longitudinal Study on Women's Health between 2000 and 2012. Age at menarche was reported at baseline in 2000 when women were aged 22-27 years. During 12 years of follow-up, information on GDM diagnosis was obtained for each live birth. Log-binomial regression analysis was used to estimate relative risks and 95% confidence intervals. Analyses adjusted for mother's highest completed educational qualification, nulliparity, polycystic ovary syndrome, physical activity, and body mass index...
March 5, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338874/does-fetal-growth-restriction-cause-later-obesity-pitfalls-in-analyzing-causal-mediators-as-confounders
#14
Michael S Kramer, Xun Zhang, Mourad Dahhou, Seungmi Yang, Richard M Martin, Emily Oken, Robert W Platt
Recent studies finding that small-for-gestational-age (SGA) birth is associated with increased adiposity in childhood and adulthood have been based on analyses "adjusting" for height, weight, or body mass index (BMI; weight (kg)/height (m)2) measured concurrently with the adiposity measurement. To assess the potential for bias due to overadjustment for a causal mediator, we compared 2 approaches to analyzing the association between SGA birth and adiposity outcomes (skinfold thicknesses and bioelectrical impedance measurement of body fat) at age 11...
March 3, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338863/attendance-at-religious-services-prayer-religious-coping-and-religious-spiritual-identity-as-predictors-of-all-cause-mortality-in-the-black-women-s-health-study
#15
Tyler J VanderWeele, Jeffrey Yu, Yvette C Cozier, Lauren Wise, M Austin Argentieri, Lynn Rosenberg, Julie R Palmer, Alexandra E Shields
Previous longitudinal studies have consistently shown an association between attendance at religious services and lower all-cause mortality, but the literature on associations between other measures of religion and spirituality (R/S) and mortality is limited. We followed 36,613 respondents from the Black Women's Health Study from 2005 through December 31, 2013 to assess the associations between R/S and incident all-cause mortality using proportional hazards models. After control for numerous demographic and health covariates, together with other R/S variables, attending religious services several times per week was associated with a substantially lower mortality rate ratio (mortality rate ratio = 0...
March 3, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338857/invited-commentary-explaining-the-relationship-between-attending-worship-services-and-mortality-a-brief-excursion-into-the-contribution-of-social-relationships-in-religious-institutions
#16
Neal Krause
In this issue of the Journal, VanderWeele et al. (Am J Epidemiol. 2017;000(00):000-000) report that more frequent attendance at worship services is associated with a lower mortality risk. However, the underlying processes that might explain this relationship were not discussed fully. A problem arises because the potentially beneficial association between attending worship services and mortality risk may be due to a number of different factors. At least part of the explanation may be found by turning to social relationships that arise in religious institutions...
March 3, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338843/vanderweele-et-al-respond-to-church-attendance-and-mortality
#17
Tyler J VanderWeele, Julie R Palmer, Alexandra E Shields
No abstract text is available yet for this article.
March 3, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338817/risk-factor-models-for-neurodevelopmental-outcomes-in-children-born-very-preterm-or-with-very-low-birth-weight-a-systematic-review-of-methodology-and-reporting
#18
Louise Linsell, Reem Malouf, Joan Morris, Jennifer J Kurinczuk, Neil Marlow
The prediction of long-term outcomes in surviving infants born very preterm (VPT) or with very low birth weight (VLBW) is necessary to guide clinical management, provide information to parents, and help target and evaluate interventions. There is a large body of literature describing risk factor models for neurodevelopmental outcomes in VPT/VLBW children, yet few, if any, have been developed for use in routine clinical practice or adopted for use in research studies or policy evaluation. We sought to systematically review the methods and reporting of studies that have developed a multivariable risk factor model for neurodevelopment in surviving VPT/VLBW children...
March 3, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338921/the-relationship-between-objectively-measured-walking-and-risk-of-pedestrian-motor-vehicle-collision
#19
D Alex Quistberg, Eric J Howard, Philip M Hurvitz, Anne V Moudon, Beth E Ebel, Frederick P Rivara, Brian E Saelens
Safe urban walking environments may improve health by encouraging physical activity, but the relationship between an individual's location and walking pattern and the risk of pedestrian-motor vehicle collision is unknown. We examined associations between individuals' walking bouts and walking risk, measured as mean exposure to the risk of pedestrian-vehicle collision. Walking bouts were ascertained through integrated accelerometry and global positioning system data and from individual travel-diary data obtained from adults in the Travel Assessment and Community Study (King County, Washington) in 2008-2009...
March 1, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28338891/associations-of-statin-use-with-colorectal-cancer-recurrence-and-mortality-in-a-danish-cohort
#20
Timothy L Lash, Anders H Riis, Eva B Ostenfeld, Rune Erichsen, Mogens Vyberg, Thomas P Ahern, Ole Thorlacius-Ussing
In earlier studies of the influence of hydroxymethylglutaryl-coenzyme A reductase inhibitors (also known as statins) on colorectal cancer prognosis, investigators reported a reduced rate of cancer-specific mortality. Studies of recurrence are few and small. Using data from Danish registries, we followed 21,152 patients diagnosed with stage I-III colorectal cancer from 2001 to 2011. We estimated the association between statin use in the preceding year and cancer recurrence, cancer-specific mortality, and all-cause mortality rates...
March 1, 2017: American Journal of Epidemiology
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