Reader's guide to critical appraisal of cohort studies: 1. Role and design.

Rochon, Paula A; Gurwitz, Jerry H; Sykora, Kathy; Mamdani, Muhammad; Streiner, David L; Garfinkel, Susan; Normand, Sharon-Lise T; Anderson, Geoffrey M · BMJ · 2005

review · Level V

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Abstract

Cohort studies can provide valuable information unavailable from randomised trials, but readers need to be alert to possible flaws

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