Reporting participation in epidemiologic studies: a survey of practice.
نویسندگان
چکیده
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 participation over time, and to evaluate the impact of increased biologic specimen collection on participation. The authors abstracted selected study characteristics from 355 peer-reviewed, original, analytic-epidemiology research articles published from January 1 to April 30, 2003, in 10 high-impact general epidemiology, public health, and medical journals. At least some information regarding participation was provided in 59% of cross-sectional studies, 44% of case-control studies, and 32% of cohort studies. Participation appears to have declined during 1970-2003 for all study designs. Participation declined most steeply for controls in population-based, case-control studies (-1.86% per year, 95% confidence interval: -3.03, -0.69), with steeper declines after 1990. Proportionately more studies collected biologic specimens over time, particularly for cohort and case-control study designs (p(trend) = 0.06 and 0.03, respectively), yet participation was reported separately for the biologic specimen study component in only 27% of studies. The authors conclude that epidemiologists need to address declining participation and to report participation consistently, including for biologic specimen collection.
منابع مشابه
Re: "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...
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ورودعنوان ژورنال:
- American journal of epidemiology
دوره 163 3 شماره
صفحات -
تاریخ انتشار 2006