I present some extensions of Bayesian methods to situations in which biases are of concern. First, a basic misclassification problem is illustrated using data from a study of sudden infant death syndrome. Bayesian analyses are then given. These analyses can be conducted directly, or by converting actual-data records to incomplete records and prior distributions to complete-data records, then ap...

The foregoing commentaries demonstrate wide differences between their authors’ choice of terms describing epidemiologic research designs, and in the relative importance they attach to directionality, timing, and sample selection. Nowhere is this more evident than in their discrepant definitions of “prospective” and “retrospective” studies. According to Drs Greenland and Morgenstern, “Prospectiv...

background : the high incidence of breast cancer in young women in iran and its resultant problems for families show the necessity of exploring studies conducted in this field. the present research was conducted to determine the volume of scientific production on breast cancer in iran, and to compare it with that of other countries in the middle east. methods : this systematic review study used...

Whereas the feasibility and effectiveness of Internet-based epidemiologic research have been established, methodological support for the quality of such data is still accumulating. We aimed to identify sociodemographic differences among members of a French cohort according to willingness to provide part of one's 15-digit national identification number (personal Social Security number (PSSN)) an...

background:the pattern of poisoning has a regional variability. this study was carried out to describe the epidemiological profile of acute poisoning in northeastern bangladesh and to evaluate the mortality. methods:in this retrospective cross-sectional study, medical records of poisoned patients treated at department of medicine of sylhet m.a.g. osmani medical college hospital, sylhet, banglad...

abstract: in contrast to traditional reviews, systematic reviews explore theliterature on a specific topic comprehensively using a well-defined protocol and recruit the findings of eligible studies after the assessment of their qualities, using a clear and reproducible method. checking the assumptions, we may merge the findings of recruited studies in a systematic review and use metaanalysis te...

BACKGROUND The counterfactual approach provides a clear and coherent framework to think about a variety of important concepts related to causation. Meanwhile, directed acyclic graphs have been used as causal diagrams in epidemiologic research to visually summarize hypothetical relations among variables of interest, providing a clear understanding of underlying causal structures of bias and effe...

PURPOSE Epidemiologists have long contributed to policy efforts to address health disparities. Three examples illustrate how epidemiologists have addressed health disparities in the United States and abroad through a "social determinants of health" lens. METHODS To identify examples of how epidemiologic research has been applied to reduce health disparities, we queried epidemiologists engaged...

Epidemiology is the study of the distribution and determinants of health-related states and in specified populations and the application to control health problems. Classified as either descriptive or analytical, a variety of epidemiologic approaches can be used to allow assessment of hypothesized risk factor exposure with disease outcomes. This article reviews salient aspects of epidemiologic ...

introduction:   renal transplantation are admitted to emergency department (ed) more than normal population. the present brief report aimed to determine the reasons of renal transplant patients’ ed visits. methods: this retrospective case series study analyzed the reasons of renal transplant recipients’ admission to one ed between 2011 and 2014. the patient data were collected via a checklist a...