HIV and STI risk-reduction participants had higher odds of reporting consistent condom use ( odds ratio [ OR ] = 1.32 ; 95 % confidence interval [ CI ] = 1.03 , 1.71 ) and condom use at last vaginal intercourse ( OR = 1.40 ; 95 % CI = 1.08 , 1.82 ) than did attention-control participants , adjusting for baseline prevalence .