Participation Rates in Epidemiologic Studies
نویسندگان
چکیده
منابع مشابه
Participation rates in epidemiologic studies.
Participation rates for epidemiologic studies have been declining during the past 30 years with even steeper declines in recent years. This wholesale decrease in participation rate, or at the very least the increase in refusal, has, quite understandably, occasioned some concern among epidemiologists who have long considered a high study participation rate as one of the hallmarks of a "good" epi...
متن کاملRe: "Reporting participation in epidemiologic studies: a survey of practice".
We read with great interest the article by Morton et al. (1) that addressed the alarming trend in declining participation rates for epidemiologic studies over recent years. The authors should be commended for addressing such an important issue. In addition to the possible reasons for decline listed by the authors, we would like to comment on another potential reason that may fall under their br...
متن کاملReporting participation in epidemiologic studies: a survey of practice.
Self-selection bias may threaten the internal validity of epidemiologic studies. Studies with a low level of participation are particularly vulnerable to this bias, and commentators note apparent declines in participation in recent years. The authors therefore conducted a retrospective review to survey the practice of reporting participation in epidemiologic studies, to assess changes in partic...
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This review basically provided a conceptual framework for sample size calculation in epidemiologic studies with various designs and outcomes. The formula requirement of sample size was drawn based on statistical principles for both descriptive and comparative studies. The required sample size was estimated and presented graphically with different effect sizes and power of statistical test at 95...
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ژورنال
عنوان ژورنال: Annals of Epidemiology
سال: 2007
ISSN: 1047-2797
DOI: 10.1016/j.annepidem.2007.03.013