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J Subst Abuse Treat. 2005 Mar;28(2):91-107.

Women, Co-occurring Disorders, and Violence Study: evaluation design and study population.

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  • 1Gregory J. McHugo, NH-Dartmouth Psychiatric Research Center, Dartmouth Medical School, Lebanon, NH 03766, USA.


The Women, Co-occurring Disorders, and Violence Study (WCDVS) was a multi-site cooperative study to evaluate new service models for women with co-occurring mental health and substance use disorders and a history of physical and/or sexual abuse. Despite common features in the service interventions and evaluation procedures, diversity across the nine sites plus differences introduced by non-random assignment led to numerous methodological challenges. This article describes the design, measurement, and analysis decisions behind the WCDVS and lays the foundation for understanding participant-level outcomes and service costs. This article also describes the study population, as recruited and following attrition at the 6-month follow-up, in order to address the threat of selection bias to inferences drawn from this multi-site study.

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