Understanding non-partner sexual violence perpetration in young Tanzanian men: a cross-sectional study

Abstract Background The World Health Organisation estimates that worldwide six percent of women aged 15–49 have experienced non-partner sexual violence (NPSV) in their lifetimes. A similar prevalence is found in sub-Saharan Africa. This form of violence is comparatively under-researched, leading to...

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Main Authors: Rebecca Brambilla, Gerry Mshana, Neema Mosha, Andrew Gibbs, Donati Malibwa, Saidi Kapiga, Heidi Stöckl
Format: Article
Language:English
Published: BMC 2025-05-01
Series:BMC Public Health
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Online Access:https://doi.org/10.1186/s12889-025-23248-4
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author Rebecca Brambilla
Gerry Mshana
Neema Mosha
Andrew Gibbs
Donati Malibwa
Saidi Kapiga
Heidi Stöckl
author_facet Rebecca Brambilla
Gerry Mshana
Neema Mosha
Andrew Gibbs
Donati Malibwa
Saidi Kapiga
Heidi Stöckl
author_sort Rebecca Brambilla
collection DOAJ
description Abstract Background The World Health Organisation estimates that worldwide six percent of women aged 15–49 have experienced non-partner sexual violence (NPSV) in their lifetimes. A similar prevalence is found in sub-Saharan Africa. This form of violence is comparatively under-researched, leading to a dearth of knowledge around potential risk factors for male perpetration of NPSV. Methods We sought to explore key risk factors for perpetration of non-partner rape, verbal and physical sexual harassment in young Tanzanian men by conducting a cross-sectional survey of 1002 young men aged 18 to 24 living in Mwanza, Tanzania between June 2021 and March 2022. We conducted unadjusted logistic regression for bivariate associations between all three forms of NPSV and risk factors at the sociodemographic, behavioural, and mental health and substance misuse level. The risk factors independently associated with the outcomes were included in three separate multivariable logistic regression models. We then used dominance analysis to determine which factors had the strongest association with all three forms of NPSV perpetration. Results Among the young men in our sample, 9% reported having perpetrated non-partner rape (n = 86), 19% having physically harassed a woman (n = 188) and 33% having verbally harassed a woman (n = 330). After adjustment for the other risk factors in the model, pornography consumption, having multiple sexual partners, gambling, and depressive symptoms remained significantly associated with more than one form of NPSV. Conclusions The widespread nature of sexual harassment and rape perpetration among young men in our study and the associated risk factors, which are all tied to notions of masculinity encouraging domination, promiscuity, and risky health behaviours, call for harmful gender norms to be addressed to reduce the incidence of NPSV.
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spelling doaj-art-22f0358984614675955b614a25fe17262025-08-20T04:02:44ZengBMCBMC Public Health1471-24582025-05-0125111310.1186/s12889-025-23248-4Understanding non-partner sexual violence perpetration in young Tanzanian men: a cross-sectional studyRebecca Brambilla0Gerry Mshana1Neema Mosha2Andrew Gibbs3Donati Malibwa4Saidi Kapiga5Heidi Stöckl6Institute for Medical Information Processing, Biometry and Epidemiology (IBE), Faculty of Medicine, LMU MunichMwanza Intervention Trials Unit (MITU)Institute for Medical Information Processing, Biometry and Epidemiology (IBE), Faculty of Medicine, LMU MunichDepartment of Psychology, University of ExeterMwanza Intervention Trials Unit (MITU)Mwanza Intervention Trials Unit (MITU)Institute for Medical Information Processing, Biometry and Epidemiology (IBE), Faculty of Medicine, LMU MunichAbstract Background The World Health Organisation estimates that worldwide six percent of women aged 15–49 have experienced non-partner sexual violence (NPSV) in their lifetimes. A similar prevalence is found in sub-Saharan Africa. This form of violence is comparatively under-researched, leading to a dearth of knowledge around potential risk factors for male perpetration of NPSV. Methods We sought to explore key risk factors for perpetration of non-partner rape, verbal and physical sexual harassment in young Tanzanian men by conducting a cross-sectional survey of 1002 young men aged 18 to 24 living in Mwanza, Tanzania between June 2021 and March 2022. We conducted unadjusted logistic regression for bivariate associations between all three forms of NPSV and risk factors at the sociodemographic, behavioural, and mental health and substance misuse level. The risk factors independently associated with the outcomes were included in three separate multivariable logistic regression models. We then used dominance analysis to determine which factors had the strongest association with all three forms of NPSV perpetration. Results Among the young men in our sample, 9% reported having perpetrated non-partner rape (n = 86), 19% having physically harassed a woman (n = 188) and 33% having verbally harassed a woman (n = 330). After adjustment for the other risk factors in the model, pornography consumption, having multiple sexual partners, gambling, and depressive symptoms remained significantly associated with more than one form of NPSV. Conclusions The widespread nature of sexual harassment and rape perpetration among young men in our study and the associated risk factors, which are all tied to notions of masculinity encouraging domination, promiscuity, and risky health behaviours, call for harmful gender norms to be addressed to reduce the incidence of NPSV.https://doi.org/10.1186/s12889-025-23248-4Non-partner sexual violenceNon-partner rapeSexual harassmentPerpetrationYoung menMasculinities
spellingShingle Rebecca Brambilla
Gerry Mshana
Neema Mosha
Andrew Gibbs
Donati Malibwa
Saidi Kapiga
Heidi Stöckl
Understanding non-partner sexual violence perpetration in young Tanzanian men: a cross-sectional study
BMC Public Health
Non-partner sexual violence
Non-partner rape
Sexual harassment
Perpetration
Young men
Masculinities
title Understanding non-partner sexual violence perpetration in young Tanzanian men: a cross-sectional study
title_full Understanding non-partner sexual violence perpetration in young Tanzanian men: a cross-sectional study
title_fullStr Understanding non-partner sexual violence perpetration in young Tanzanian men: a cross-sectional study
title_full_unstemmed Understanding non-partner sexual violence perpetration in young Tanzanian men: a cross-sectional study
title_short Understanding non-partner sexual violence perpetration in young Tanzanian men: a cross-sectional study
title_sort understanding non partner sexual violence perpetration in young tanzanian men a cross sectional study
topic Non-partner sexual violence
Non-partner rape
Sexual harassment
Perpetration
Young men
Masculinities
url https://doi.org/10.1186/s12889-025-23248-4
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