Lee 2012.

Study characteristics
Methods	Objective Development of a search filter using a previously validated filter, which included the terms: MEDLINE.tw, systematic review.tw, meta‐analysis.pt, combined with the Boolean OR operator. To customize this filter to retrieve only those systematic reviews of interventions, the term ‘intervention’ was added as an indexing term. This method was validated with the use of a gold standard and compared to other published systematic review filters. The authors modified the filter for use in Embase and CINAHL due to differences in indexing terms between the various databases.
Data	Gold standard: produced by using two distinct components: 1) indexing terms and keywords referring to systematic review methods, combined with the Boolean ‘OR’ operator (systematic, meta analysis, review); and 2) indexing terms and keywords referring to public health content areas, combined with the Boolean ‘OR’ operator (community health services, education, health education, health promotion, prevention, preventive). The content and methods components were then combined using the Boolean ‘AND’ operator.
Comparisons	External validation: data set of 219 articles indexed between January 2004 and December 2005. Comparisons to other filters:Boynton 1998 ; BMJ Clinical Evidence ; Hunt 1997 ; NHS 1996 ; SIGN ; Shojania 2001 ; Wilczynski 2007
Outcomes	Sensitivity, specificity, precision, number needed to read
Notes	MEDLINE 1. MEDLINE.tw. 2. systematic review.tw. 3. meta‐analysis.pt. 4. intervention$.ti 5. or/1‐4 EMBASE 1. MEDLINE.tw. 2. exp systematic review/ or systematic review.tw 3. meta‐analysis/ 4. intervention$.ti 5. or/1‐4