Risk factors for HIV infection: odds ratios (ORs) for selected sexual knowledge and reported behaviours.

NOTE: OR: odds ratio; CI: confidence interval; STD: sexually transmitted diseases; p: pvalue from likelihood-ratio test; pt: pvalue from likelihood -ratio test for linear trend; NA: not applicable.aAdjusted for age, occupation and marital status.bAdjusted for age, religion, occupation, marital status and length of time slept away past year.cAdjusted for age, occupation, marital status and number of lifetime partners Adjusted for age, religion, occupation, marital status, length of time slept away past year, HIV knowledge and ever used condom.eAdjusted for age, religion, occupation, marital status, length of time slept away past year, HIV knowledge, ever used condom and number of lifetime partners.