In addition to reducing HIV-related stigmatizing beliefs,

intervention designed to help Nigerian men decrease risk for HIV, sexually transmitted infections, and unintended pregnancy. The intervention was delivered in groups during two 5-hour workshops, with a monthly 2-hour check-in session. A comparison condition consisted of a group-based half-day didactic workshop. Based on recruitment area, 149 men were assigned to the intervention and 132 to the comparison. Men were evaluated at baseline and 3-month post-intervention. At follow-up, men assigned to the intervention were almost four times more likely than comparison men to report condom use at last intercourse (P <> and to report fewer unprotected vaginal sex occasions, greater self-efficacy for negotiation, a more egalitarian power dynamic in their primary relationship, more positive expectations for condom use, and greater intention for future consistent condom use (all P values < style="font-weight: normal;"> In addition to reducing HIV-related stigmatizing beliefs, this group-based cognitive-behavioural ‘mobilising men as partners’ intervention, tailored to the needs and culture of Nigerian men, resulted in significantly higher safer-sex self-efficacy and yet significantly less male-dominated power dynamics in primary relationships. Whether the results seen at 3 months would be sustained over time, whether there was community level influence supporting the positive changes (the intervention men were from different communities than the control men), and whether their female partners would corroborate the findings are all questions deserving further investigation.