Who drops out of drug-user treatment research on women?

Attrition or dropping out is an important methodological issue in drug-user treatment research. The purpose of this study was to describe and explain the degree of subject attrition-more specifically, postinclusion attrition-within the context of a research demonstration project which focused on a women's sensitive approach to drug-user treatment. Demographic variables, psychosocial outcome measures, and two treatment variables were examined as possible predictors of attrition from research participation. Findings showed attrition rates increased from admission, peaked at 3-month follow-up, and then declined substantially by the 12-month follow-up period. A logistic regression analysis showed only treatment discharge status to significantly predict subject attrition.