Lifetime needle sharing: a predictive analysis.

Through understanding predictors of needle sharing, it may be possible to design AIDS prevention interventions more effectively. Data were collected from a sample of 416 patients in two New York City methadone programs in 1990. Questions were asked about needle sharing and about a battery of predictors covering 11 psychosocial domains. Based on factor analysis, these were reduced to seven factors: criminal history, antisocial characteristics, social integration, severity of psychiatric problems, current drug involvement, physical health, and personality disorders. Bivariate analyses showed that criminal involvement, antisocial characteristics, social integration, and age were significantly related to needle sharing. With the seven factors, as well as age, gender, and ethnicity simultaneously examined by means of regression analysis, it was found that criminal involvement, severity of psychiatric problems, and age were all positively associated with needle sharing. Implications for treatment are discussed.