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Study Search

The review team identified and assessed hundreds of studies released since 1989. Use the search fields below to identify individual studies, or click the “List All” button to generate a complete list of all studies reviewed.

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Study Quality Rating*

High ?High - Given to RCTs with low attrition, no reassignment of sample members, no systematic differences in data collection processes between groups, and that have at least two clusters in each group (for cluster designs). Low ?Low –Given to studies that do not meet the review standards for either a high or moderate quality rating.

Moderate ?Moderate –Given to (1) RCTs that do not meet all of the review criteria for a high quality rating and (2) QEDs that demonstrate baseline equivalence, do not have systematic differences in data collection processes, and have at least two clusters in each group (for cluster designs).

N/A ?Not applicable –Given to studies that do not meet the review eligibility criteria.

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*A detailed description of the study quality ratings is presented in the review protocol.

Study Search

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To search for studies, indicate the search criteria to use in the left hand panel.

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Study Database