Cluster randomized controlled trial to evaluate a male-focused primary prevention programme which used a men's only group discussion format to prevent intimate partner violence against women & girls through fostering knowledge and behaviour changes by: (1) increasing men's knowledge on the impact of violence against women; (2) promoting gender equitable beliefs/behaviours within relationships; and (3) developing anger management techniques.

Inclusion Criteria:

• 15+ years old
• males: participant in group intervention or selected as control
• females: female intimate partner of males in intervention or selected as control
• capable of completing face-to-face interview independently and without causing undue psychological distress

Exclusion Criteria:

• lack of informed consent