A filter is a search strategy that has been developed to define certain criteria for your search. The Centre for Reviews and Dissemination has a list of published filters along with information on appraisal of search filters, links to articles that have evaluated filters, etc. When selecting a filter, be sure to look at the date of development as changes to database terms and structure can affect the performance of the search filter.
The filters displayed on this page will help you locate specific types of studies (clinical trials, cohorts, cross-sectionals, etc.) as well as systematic reviews and meta-analyses. They are designed to be broad so you may retrieve items that don't seem to fit. By being broad, though, these searches are more likely to retrieve the items you need as long as the other terms incorporated into the search are inclusive. Unless otherwise indicated, these filters were developed and tested during the last half of 2010.
These filters have not been tested for sensitivity (true positives) or specificity (true negatives). They have been developed through experience and based on the findings of other researchers who have tested their search strategies.
How do I use the filters?
To use the filters:
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