RE: "ECOLOGIC STUDIES--BIASES, MISCONCEPTIONS, AND COUNTEREXAMPLES"
نویسندگان
چکیده
منابع مشابه
Invited commentary: ecologic studies--biases, misconceptions, and counterexamples.
Many authors have pointed out that relative-risk estimates derived from ecologic data are vulnerable to biases not found in estimates derived from individual-level data. Nevertheless, biases in ecologic studies still are often dealt with in the same manner as biases in other observational studies, and so are not given adequate treatment. This commentary reviews and illustrates some of the more ...
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Ecologic studies use data aggregated over groups rather than data on individuals. Such studies are popular because they use existing databases and can offer large exposure variation if the data arise from broad geographical areas. Unfortunately, the aggregation of data that define ecologic studies results in an information loss that can lead to ecologic bias. Specifically, ecologic bias arises ...
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ژورنال
عنوان ژورنال: American Journal of Epidemiology
سال: 1996
ISSN: 0002-9262,1476-6256
DOI: 10.1093/oxfordjournals.aje.a008773