Development of common disorders involves a complex interplay of multiple factors. We may assume that many genes and many environmental factors are involved. Future gene–environmental cohort studies ...
A new BMJ collection examines how well designed large scale research can benefit global health With a population of 1.4 billion—nearly a fifth of the global total—and rapid societal transformations, ...
For those not familiar with the term, a “meta-analysis” is a quantitative, formal, epidemiological study design used to systematically assess the results of previous research to derive conclusions ...
The self controlled case series (SCCS) method is an epidemiological study design for which individuals act as their own control—ie, comparisons are made within individuals. Hence, only individuals who ...
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