Crack cocaine and sex.

The impact of crack cocaine use on number of sex partners was examined using bivariate analyses and a logistic model on a national treatment cohort of 4939 individuals. Number of sex partners over the last 12 months was dichotomized as none/one versus multiple partners for the logistic analyses. The model included 11 independent variables not including prostitution or use of crack cocaine. For both genders, the bivariate analyses showed significant positive associations between crack use and number of partners regardless of type of sexual activity; those who used crack had more partners for all sexual activities queried, compared to those who did not. Cocaine, whether in powder or crack form, was positively associated with prostitution for both genders. For men the odds ratio for crack cocaine use ranged from 1.6 (heterosexual anal) to 5.5 (homosexual anal) and for women from 2.9 (heterosexual oral) to 4.1 (homosexual oral). If prostitution is added to the model the odds ratios are reduced for homosexual activities for men and reduced dramatically for all types of sexual activity for women.