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Activity Number:
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519
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Type:
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Invited
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Date/Time:
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Thursday, August 2, 2007 : 10:30 AM to 12:20 PM
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Sponsor:
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WNAR
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| Abstract - #307698 |
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Title:
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Breaking the Matches in Community Intervention Trials
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Author(s):
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Allan Donner*+
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Companies:
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University of Western Ontario
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Address:
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1151 Richmond St., London , ON, N6A 5C1, Canada
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Keywords:
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community intervention trials ; pair-matching ; regression analysis ; clustering
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Abstract:
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Pair-matched cluster randomization trials are frequently adopted as the design of choice for evaluating an intervention offered at the community level. However previous research has demonstrated that a strategy of breaking the matches and performing an unmatched analysis may be more efficient than performing a matched analysis on the resulting data, particularly when the total number of communities is small and the matching is judged as relatively ineffective. The research concerning this question has naturally focused on testing the effect of intervention. However an important secondary objective of many community intervention trials is to investigate the effect of individual-level risk factors on one or more outcome variables. Focusing on the case of a continuous outcome variable, we investigate the impact of breaking the matches from the perspective of this objective.
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- The address information is for the authors that have a + after their name.
- Authors who are presenting talks have a * after their name.
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