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Subject Selection Bias in Alcoholics Volunteering for a Treatment Study
Journal article   Peer reviewed

Subject Selection Bias in Alcoholics Volunteering for a Treatment Study

David B. Strohmetz, Arthur I. Alterman and Dan Walter
Alcoholism, clinical and experimental research, Vol.14(5), pp.736-738
10/1990
PMID: 2264602
Web of Science ID: WOS:A1990EE70000016

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Abstract

Baseline differences in alcoholism problem severity were compared between alcoholics who did and did not volunteer to participate in a treatment effectiveness study. A positive relationship was found between self-reports of alcohol-related problems and the degree of research participation. Group differences were also revealed in the rate of treatment completion. Possible explanations and solutions for this volunteer bias are discussed.

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