Challenges and recommendations on the conduct of systematic reviews of observational epidemiologic studies in environmental and occupational health
Published systematic reviews and meta-analyses of environmental and occupational epidemiology studies have increased dramatically in recent years, aided by the creation and adoption of new methodologies to standardize the review process. However, the quality and utility of published reviews has been variable. Most methodologies were adapted from clinical epidemiology and have not been adequately modified to evaluate observational studies of environmental and occupational epidemiology.