Searching one or two databases was insufficient for meta-analysis of observational studies

Lemeshow, Adina R.; Blum, Robin E.; Berlin, Jesse A.; Stoto, Michael A.; Colditz, Graham A.

doi:10.1016/j.jclinepi.2005.03.004

Cited by 125 publications

(78 citation statements)

References 40 publications

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“…It has been demonstrated in many studies concerning various specialties, including occupational medicine, that the recall ratio of Medline was far from 100% (1,6,(13)(14)(15)(16).…”

Section: Discussionmentioning

confidence: 99%

Searching for high-quality articles about intervention studies in occupational health – what is really missed when using only the Medline database?

Rollin¹,

Darmoni²,

Caillard³

et al. 2010

Scand J Work Environ Health

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“…It has been demonstrated in many studies concerning various specialties, including occupational medicine, that the recall ratio of Medline was far from 100% (1,6,(13)(14)(15)(16).…”

Section: Discussionmentioning

confidence: 99%

Searching for high-quality articles about intervention studies in occupational health – what is really missed when using only the Medline database?

Rollin¹,

Darmoni²,

Caillard³

et al. 2010

Scand J Work Environ Health

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“…In 21% of the reviews only one database was used. In guidelines for systematic reviews of clinical trials [3,8] and observational studies [45] it is suggested that limiting a search to a single database will not provide a thorough summary of the existing literature.…”

Section: Appraisal Of the Review Processmentioning

confidence: 99%

Evaluation of the methodological quality of systematic reviews of health status measurement instruments

et al. 2009

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A systematic review of measurement properties of health-status instruments is a tool for evaluating the quality of instruments. Our aim was to appraise the quality of the review process, to describe how authors assess the methodological quality of primary studies of measurement properties, and to describe how authors evaluate results of the studies. Literature searches were performed in three databases. One hundred and forty-eight reviews were included. The purpose of included reviews was to identify health status instruments used in an evaluative application and to report on the measurement properties of these instruments. Two independent reviewers selected the articles and extracted the data. Reviews were often of low quality: 22% of the reviews used one database, the search strategy was often poorly described, and in many cases it was not reported whether article selection (75%) and data extraction (71%) was done by two independent reviewers. In 11 reviews the methodological quality of the primary studies was evaluated for all measurement properties, and of these 11 reviews only 7 evaluated the results. Methods to evaluate the quality of the primary studies and the results differed widely. The poor quality of reviews hampers evidence-based selection of instruments. Guidelines for conducting and reporting systematic reviews of measurement properties should be developed.

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“…Like any database, however, its coverage is not complete and varies according to the specific field of health care. 18 The issue of a comprehensive search strategy to retrieve the greatest number of available studies for a meta-analyses has been addressed for clinical trials 20 and observational studies 21 both showing that at least Medline, another electronic database plus hand searching should be used to provide a thorough summary of existing published literature. Even though the issue has not been explored in the field of genetic association studies, from our results we argue that a large amount of the meta-analyses published so far, at least in the field of cancer research, might be biased because of the incomplete retrieval of the studies, and this should be carefully considered.…”

Section: Discussionmentioning

confidence: 99%

A systematic review evaluating the methodological aspects of meta-analyses of genetic association studies in cancer research

et al. 2010

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Searching one or two databases was insufficient for meta-analysis of observational studies

Cited by 125 publications

References 40 publications

Searching for high-quality articles about intervention studies in occupational health – what is really missed when using only the Medline database?

Searching for high-quality articles about intervention studies in occupational health – what is really missed when using only the Medline database?

Evaluation of the methodological quality of systematic reviews of health status measurement instruments

A systematic review evaluating the methodological aspects of meta-analyses of genetic association studies in cancer research

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