Observational studies

Database Filter
CINAHL SIGN strategy [undated] [Ovid]
EMBASE Fraser C, Murray A, Burr J. Identifying observational studies of surgical interventions in MEDLINE and EMBASE. BMC Medical Research Methodology 2006;6(41). [Ovid]

BMJ Clinical Evidence - EMBASE cohort study filter [undated] [Ovid]

BMJ Clinical Evidence - EMBASE cohort and case-control filter [undated] [Ovid]

BMJ Clinical Evidence - EMBASE cohort, case-control and case series filter [undated] [Ovid]

BMJ Clinical Evidence - EMBASE cohort, case-control, case series and case study filter [undated] [Ovid]

SIGN strategy [undated] [Ovid]
MEDLINE

University of Texas School of Public Health. Search filters for case-control studies, cohort studies, cross-sectional studies, clinical trials, epidemiological studies. Accessed 25 Nov 2011. [Ovid, PubMed]

Grady EBM strategy [2007] [Ovid]

Fraser C, Murray A, Burr J. Identifying observational studies of surgical interventions in MEDLINE and EMBASE. BMC Medical Research Methodology 2006;6(41). [Ovid]
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Wieland S, Dickersin K. Selective exposure reporting and Medline indexing limited the search sensitivity for observational studies of the adverse effects of oral contraceptives. J Clin Epidemiol. 2005;58(6):560-7. [PubMed]

Part of this paper was also presented as: Wieland S, Brodney S, Dickersin K. Designing an efficient and precise search strategy for observational studies. 10th Cochrane Colloquium; 2002 31 July - 3 August; Stavanger, Norway:23-4. [PubMed]
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BMJ Clinical Evidence - MEDLINE cohort study filter [undated] [Ovid]

BMJ Clinical Evidence - MEDLINE cohort and case-control filter [undated] [Ovid]

BMJ Clinical Evidence - MEDLINE cohort, case-control and case series filter [undated] [Ovid]

BMJ Clinical Evidence - MEDLINE cohort, case-control, case series and case study filter [undated] [Ovid]

SIGN strategy [undated] [Ovid]
PsycINFO University of Texas School of Public Health. Search filters for case-control studies, cohort studies, cross-sectional studies, clinical trials. Accessed 25 Nov 2011. [Ovid]