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International Journal of Epidemiology 2002;31:86-87
© International Epidemiological Association 2002

Special Theme: Systematic Reviews and Meta-Analysis

Commentary: Improving pooled analyses in epidemiology

Christine M Friedenreich

Alberta Cancer Board, Calgary, AB, Canada.

Alberta Cancer Board, Division of Epidemiology, Prevention and Screening, 1331-29 St NW, Calgary, Alberta T2N 4N2, Canada. E-mail: chrisf@cancerboard.ab.ca

Four types of reviews of existing literature and extant data have been defined for epidemiological studies: traditional narrative reviews, meta-analyses of published studies, and pooled analyses of individual-level data that are either retrospectively or prospectively planned.1 The methods for the conduct and reporting of meta-analyses and pooled analyses of observational epidemiological studies have been described2,3 and these types of reviews of epidemiological evidence are now being performed more frequently. The Pooling Project, a retrospectively planned pooled analysis, has been on-going since 1990, and the most recent publication on the association between meat and dairy products and breast cancer risk from that pooled data set is presented in this issue of the International Journal . . . [Full Text of this Article]

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