Associations between drug abuse treatment and cigarette use: evidence of substance replacement.

The influence of risk-behavior bias, drug use, prior cigarette use, and prior and current participation in drug treatment on cigarette use was analyzed using a 3-wave survey of 346 drug abusers. Participation in drug treatment and a risk-behavior bias were hypothesized to predict greater cigarette use. After controlling for prior levels of cigarette use with a longitudinal path model, it was found that participation in drug treatment at Wave 2 significantly predicted increased cigarette use at Wave 2. There were similar results at Wave 3. Additional analyses indicated that reduced heroin use was especially associated with more smoking. Risk-behavior bias predicted more drug and cigarette use and predicted less participation in drug treatment at Wave 3. These results suggest that drug treatment, reduced heroin use, and a tendency toward risky behavior may lead to increased cigarette use, which may represent a form of substance replacement.