Compared with the control cluster , at the @-month follow-up assessment , the intervention cluster had a significantly higher proportion of correct answers to queries about human immunodeficiency virus/acquired immunodeficiency syndrome ( HIV/AIDS ) ( standardised coefficients of multiple linear regression ( B ) @ ; P = @ ) and awareness of places providing free contraceptives ( odds ratio -LSB- OR -RSB- @ , @ % confidence interval -LSB- CI -RSB- @-@ @ ; P < @ ) , and a significantly lower proportion accepting premarital sex ( OR @ , @ % CI @-@ @ ; P < @ ) , practising premarital sex ( OR @ , @ % CI @-@ @ ; P < @ ) or suffering from gynaecological disorders ( OR @ , @ % CI @-@ @ ; P = @ ) .