Participants in the experimental condition reported a higher proportion of condom-protected sexual acts in the @ days ( mean difference = @ ; @ % CI , @ to @ ; P = @ ) and @ months ( mean difference = @ ; @ % CI , @ to @ ; P = @ ) prior to assessments and fewer episodes of sexual acts while high on drugs and/or alcohol ( mean difference = -@ ; @ % CI , -@ to -@ ; P < @ ) .