The current investigation explores the clinical utility in providing a series of enhanced clinical services to a sample of 303 cocaine-abusing clients (primarily crack smokers) relative to a standard group therapy treatment program. In addition to examining the comparative impact of six varying psychosocial treatment approaches for cocaine abuse on client retention and treatment exposure rates, an additional emphasis has been to examine the ability of fixed and dynamic client variables in predicting client outcome in this regard. No fixed (e.g., sex, income, marital status, income level, or employment status) or dynamic (e.g., recent alcohol use, antisocial personality disorder diagnoses, or motivational variables) client characteristics were useful in predicting client client retention or treatment exposure rates. Program characteristics, however, or the frequency, intensity, and/or type of treatment services offered, were related to client retention and treatment exposure. Treatment exposure and retenti...