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 ...

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, ...

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 ...

Case-cohort study designs represent a cost-effective and efficient strategy for analysing time-to-event data, particularly when the event of interest is rare. By selecting a random subcohort along ...