RT Journal Article SR Electronic T1 Community collective efficacy is associated with reduced physical intimate partner violence (IPV) incidence in the rural province of Mpumalanga, South Africa: findings from HPTN 068 JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 176 OP 181 DO 10.1136/jech-2018-211357 VO 73 IS 2 A1 Anna M Leddy A1 Sheri A Lippman A1 Torsten B Neilands A1 Rhian Twine A1 Jennifer Ahern A1 Francesc Xavier Gómez-Olivé A1 Stephanie M DeLong A1 Catherine MacPhail A1 Kathleen Kahn A1 Audrey E Pettifor YR 2019 UL http://jech.bmj.com/content/73/2/176.abstract AB Background Intimate partner violence (IPV) is a human rights violation and is associated with a variety of adverse physical and mental health outcomes. Collective efficacy, defined as mutual trust among community members and willingness to intervene on the behalf of the common good, has been associated with reduced neighbourhood violence. Limited research has explored whether community collective efficacy is associated with reduced incidence of IPV. This is of particular interest among adolescent girls and young women (AGYW) in sub-Saharan Africa, where the burden of HIV is greatest and IPV is common.Methods We collected longitudinal data among 2533 AGYW (ages 13–20) enrolled in the HPTN 068 cohort in Mpumalanga province, South Africa between 2011 and 2016. We included participants from 26 villages where community surveys were collected during the HPTN 068 study. Collective efficacy was measured at the village level via two population-based cross-sectional surveys in 2012 and 2014. Multivariable Poisson generalised estimating equation regression models estimated the relative risk ratio (RR) between village collective efficacy scores and subsequent physical IPV 12 month incidence, adjusting for village-level clustering and covariates.Results Thirty-eight per cent of the cohort (n=950) reported at least one episode of recent physical IPV during follow-up. For every SD higher level of collective efficacy, there was a 6% lower level of physical IPV incidence (adjusted RR: 0.94; 95% CI 0.89 to 0.98) among AGYW after adjusting for covariates.Conclusions Community-level interventions that foster the development of collective efficacy may reduce IPV among AGYW.