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Mental ill health and factors associated with men’s use of intimate partner violence in Zimbabwe

Abstract

Background

Over the years, researchers have relied on data from women victims to understand the profile on male perpetrators of intimate partner violence (IPV). IPV studies with male participants in the general population are still emerging in Africa. The contribution of mental ill health to IPV perpetration in the general population that has been documented elsewhere is emergent. Notwithstanding, research with male perpetrators is essential to informing effective prevention programmes and interventions. To contribute to the emerging literature on male perpetrators, we conducted a study to estimate the prevalence and factors associated with IPV perpetration by men in heterosexual relationships. We also modelled pathways to IPV perpetration using data from Zimbabwe.

Methods

Data were collected through a nationwide survey employing a random and multi-staged sampling method. We recruited and administered a structured questionnaire to 2838 men aged 18 years and above. IPV was measured using an adapted WHO Domestic Violence Questionnaire. Determinants of IPV measured included child abuse, alcohol abuse, post-traumatic stress disorder (PTSD), depressive symptoms, personal gender attitudes and risky sexual behaviours. Multivariate regression modelling was used to assess factors associated with IPV perpetration. Structural equation modelling was used to explore the underlying pathways to recent IPV perpetration.

Results

Forty one percent of men had perpetrated IPV in their lifetime and 8.8% percent of men perpetrated IPV in the 12 months before the survey. Older, more educated men, men who binge drank, men who were abused as children or experienced other life traumatic experiences were more likely to perpetrate IPV in lifetime. Depressive symptoms and sexual relationship power (were also associated with lifetime IPV perpetration. IPV perpetration in the last 12 months was associated with binge drinking, PTSD and sexual relationship power. The pathways to IPV perpetration in the last 12 months from child abuse to recent IPV were mediated by comorbid PTSD symptoms, depression binge drinking and sexual relationship power.

Conclusions

IPV perpetration was associated with child abuse history, mental ill health, sexual relationship power and personal gender attitudes. Interventions to reduce IPV need to engage men to address gender inequality, mental ill health and reduce alcohol consumption.

Peer Review reports

Background

According to the World Health Organisation, one in every three women (35%) across the globe have experienced some form of physical and or sexual violence perpetrated by their male intimate partner in their lifetime [1]. Population-based research on men’s use of violence is emerging and shows higher rates of disclosure of violence compared to research with women’s samples. Studies from Southern Africa have found lifetime prevalence of physical IPV perpetration that are over 30% [2,3,4,5,6,7]. Factors associated with violence perpetration differ across settings but include socio-economic status, alcohol abuse, and history of child abuse, risky sexual behaviours, educational status, and conservative attitudes condoning violence, relationship conflict and mental ill health. [7,8,9]. Sociodemographic characteristics associated with IPV in Sub-Saharan Africa are poverty-related and include low education, low income and unemployment [1, 8]. These three factors are related in that higher education helps to enable access to resources including formal or high paying employment. Failure to get education and therefore income render men into feelings of less masculine status and in order to compensate for this, men opt to use violence to assert their power over women or to gain their cooperation [8, 10]. This paper looks at IPV perpetration in an economy that has deprived men of their traditional breadwinning privileges and powers.

Use of violence is more prevalent among men who endorse patriarchal norms supporting male dominance and sexual entitlement is more prevalent among men using violence [11]. Men enacting harmful forms of hyper-masculinity are more likely to perpetrate IPV [6]. There is also evidence showing association between risky sexual behaviours and IPV perpetration [12,13,14,15]. Men who perpetrate partner violence were found to be more likely than other men to engage in HIV risk behaviours such as having many sexual partners and practicing transactional sex [15]. It is therefore important to research male perpetration of violence as it is a risk factor for both violence and many other risky sexual behaviours.

Mental ill health, in particular, post-traumatic stress disorder has been shown to increase risk for IPV perpetration [16, 17]. PTSD symptoms are frequently comorbid with depressive symptoms and some studies have established an association between depression and IPV perpetration which can be direct or indirect through binge drinking [12, 18]. Binge drinking or alcohol abuse has also been found to be a risk factor for IPV perpetration in different studies [8, 19,20,21]. More studies investigating the role of mental ill health in intimate partner violence perpetration have been conducted in developed countries and fewer studies have been conducted in the global south. Data with general population samples and developing countries is emerging [9].

Research conducted in Zimbabwe with women shows that IPV is a prevalent societal problem [22,23,24]. However, perpetration research with general population samples of men and with a national coverage is lacking. Understanding the profile and characteristics of male perpetrators on a national scale is key in developing programmes and interventions to curb the scourge of violence against women. To fill that gap in literature, we conducted a nationwide household survey to determine the prevalence of lifetime perpetration of sexual or physical IPV and the associated factors among men from the general population in Zimbabwe. This study went beyond analyzing factors associated with IPV perpetration to analyzing the causal pathways to IPV perpetration at two different levels – lifetime IPV and IPV in the last 12 months. This analysis helps to assess further the dynamics and relationships between IPV perpetration and different factors in a man’s life.

Methods

The study was a cross sectional national household survey conducted in 2012 in Zimbabwe. In the survey, participants were selected through a multi-stage random sampling method, using the 2002 Zimbabwe Population Census as the primary sampling frame. At the first sampling stage districts were sampled from all the 10 provinces using a proportionate to size method. At the district level, the primary sampling unit used were the Enumeration Areas (EAs). An enumeration area, also called a census block or census tract, is the smallest geographic unit for which census information is aggregated, compiled and disseminated. An enumeration area is defined by boundaries described on a sketch map or in a geographic information system (GIS) database [25]. Again, a proportionate to size approach was used to determine the number of EAs selected per district and the national total of 225 EAs. In each selected EA, 20 households were selected and in each household only one eligible man was randomly selected for participation. To be eligible for participation in the study, a man had to be 18 years and above and normally resident in the selected household i.e. sleeping at least four nights a week in the household. Men who were visiting households or who were intoxicated or not in a mental state to complete questionnaires were excluded. While the target sample was 4507 men, only 3274 men in selected households were eligible, available and consented to participate. The survey’s overall response rate was 78%. [26].

Ethical considerations

The study was conducted in collaboration with and approved by the Government of Zimbabwe’s Ministry of Women Affairs, Gender and Community Development (MWAGCD). Participation in the study was voluntary and prior written informed consent was given by all participants. Interviews were conducted in privacy and participants were assured of confidentiality. To ensure anonymity participants were assigned to random study ID numbers. Unlike studies of women’s experiences of violence where risk for IPV after the interview is high and the need for counselling and support is much more pronounced [27], the planning of this study perceived that there was minimum risk among male participants and their families as a result of this study. However, in case of risk, participants were informed to consult study officials who would assist them. As expected, we did not receive any participant request for help, neither did we identify participants requiring urgent violence or mental health related assistance.

Data collection

Data was collected through self-administered questionnaires loaded onto a personal digital assistant (PDA). Men aged 18 or older normally resident in the sampled household were recruited and interviewed by trained male researchers using structured questionnaires in a language chosen by the participant from English, Shona or Ndebele.

The questionnaire

The primary outcome of interest was lifetime sexual or physical IPV perpetration and these were measured using an adapted and pretested version of the WHO Multi-Country Study on Women’s Health and Domestic Violence: Core Questionnaire and WHO Instrument – Version 9 designed for use in developing countries [28]. Table 1 shows the list and flow of questions used in the questionnaire. Sexual IPV was measured using a sub-scale of three items including forcing an intimate partner to have sex or perform sexual acts against their consent by using physical force or other means. Physical IPV was measured using a sub-scale of five items of acts of violence including slapping, throwing dangerous objects, pushing, kicking, hitting, dragging, choking, beating, burning or threatening a current or previous intimate partner with a weapon. Emotional IPV was measured by a series of six acts that described controlling, frightening, intimidating or undermining women’s self-esteem. IPV experience in the past 12 months was measured using a follow-up question to each set of sub-scale questions for emotional, sexual and physical IPV as follows: “Have any of these things happened in the past 12 months?” The composite lifetime IPV variable was derived from combining the physical and/or sexual IPV and emotional IPV subscale items and if a man had done any of the acts towards a partner. A similar approach was used for the IPV past 12 months variable.

Table 1 Scale and variable items

Sociodemographic characteristics measured included age, level of education attained, employment status in the year before the study. HIV risk characteristics measured included the number of sexual partners in the year preceding the survey and having sex with a sex worker. Determinants of IPV perpetration measured included child abuse, gender attitudes, mental ill health outcomes: PTSD, depression and alcohol abuse, socio-demographics characteristics, relationship characteristics, and HIV risky behaviours. Child abuse was measured through thirteen items of a modified version of the short form of the Childhood Trauma Questionnaire (CTQ) [29] (Table 1). Responses to items were Never [1], Sometimes [2], Often [3] and Very often [4]. A continuous child abuse score was created by summing up the response items (Range 13–52). A score greater than 13 was indicative of experience of child abuse. Higher scores indicated more frequent, severe forms of adverse child abuse experiences.

PTSD was measured using 30 items of the Harvard Trauma Questionnaire (HTQ) (Cronbach’s alpha = 0.95) [30]. Responses to items were Not at all (0), A little [1], Quite a bit [2] and Extremely [3]. A continuous PTSD score was created by summing up responses to items (Range 0–90). Higher than 30 scores were indicative of presence of PTSD symptoms.

Depressive symptoms were measured using the 20-item Centre for Epidemiologic Studies Depression (CES-D) self-report measure (Cronbach’s alpha =0.81) [28]. Responses to items were “Rarely or none of the time (0), Some or a little of the time (1–2 days) [1], Moderate amount of time (3–4 days) [2] and Most or all of the time (5–7 days) [3]”. A continuous CES-D score was obtained by summing up responses to items (Range 0–60). A score higher than 16 was indicative of more severe depressive symptoms.

Binge drinking was measured using the Alcohol Use Disorders Identification Test (AUDIT) scale [31]. We used the question “How often do you have 5 or more drinks on one occasion?” Responses were “never, less than monthly, monthly, weekly and daily or almost daily.” A man was said to be a binge drinker if he consumed 5 or more drinks on one occasion on a weekly, daily or almost daily basis.

Experience of traumatic life events was measured through an adapted Life Events Checklist from the PTSD Checklist (Table 1)) [30]. Responses to items were either Yes [1] or No (0). A continuous life events score was created by summing up the response items (Range 0–10). The traumatic live events score increased with the number of traumatic events exposures.

We used the Gender Equitable Men Scale (GEMS) to measure attitudes toward gender norms in intimate relationships and differing social expectations for men and women (Table 1) [32]. Responses were “Strongly agree [1], Agree [2], Disagree [3] and Strongly Disagree [4]” (Range 10–40). Higher scores were indicative of progressive and more equitable gender attitudes.

We used an adaptation of the Sexual Relationship Power Scale (SRPS) to measure power within sexual relationships. The scale consisted of relationship control items that predict sexual and physical violence, condom use and partner infidelity (Table 1) [33]. Responses were “Strongly agree [1], Agree [2], Disagree [3] and Strongly disagree [4]” (Range 12–48). Higher scores were indicative of more equitable sexual relationship power.

Data analysis

For this secondary analyses we excluded men who had never been in a heterosexual intimate relationship (n = 436). All data analyses were done using Stata version 13 considering the survey’s multi-stage sample design. We used cross tabulations to describe the prevalence of lifetime and past 12 months IPV perpetration against the different sociodemographic variables, binge drinking, and sexual partners (Table 2). For the continuous variables - Child abuse, CESD, PTSD, Life events, GEM and SRPS Scores, we used t-tests to compare the means across perpetrator vs non-perpetrator groups for both the lifetime IPV and past 12 months IPV (Table 3).

Table 2 IPV perpetration disaggregated by categorical variables
Table 3 IPV disaggregated by continuous variables

To test for factors associated with lifetime and past 12 months IPV, we built logistic regression models. We included characteristics that had a p-value less than 0.2 in bivariate analyses into regression models. We controlled for the effect of sociodemographic variables (age, education and working for income) in models. We then used a stepwise backward elimination approach to eliminate non-significant associations until final models were arrived at that were parsimonious (Table 4).

Table 4 Factors associated with lifetime and past 12 months IPV perpetration

Further to the logistic regression modelling, we employed Structural Equation Modelling (SEM) with maximum likelihood estimation to investigate the underlying pathways of factors associated with recent/or 12 months IPV perpetration. Our a priori model was that there were significant inter-relationships between variables. Child abuse could be associated with life traumatic events, mental ill health, gender scales and IPV perpetration. Gender scales could predict IPV perpetration. Mental ill health symptoms could be comorbid and predict IPV perpetration. We fitted an SEM model based on known assumptions from the literature (for example that gender imbalance could predict IPV perpetration [34]) and the results from the regression model i.e binge drinking, PTSD and sexual relationship power predicted past 12 months IPV perpetration. We specified model paths and allowed the errors of indicator variables to co-vary when the covariance improved the model fit and was theoretically justifiable. We covaried SRPS with GEM scores, binge drinking with GEM score and age with education. We estimated the model and tested for goodness of fit of the model by assessing the Comparative Fit Index and the Root mean squared error of approximation (RMSEA). The final model’s standardized parameter estimates are displayed in Table 5.

Table 5 SEM model statistics

Results

The sample comprised 2838 men who had been in heterosexual intimate relationships: 41% perpetrated IPV in lifetime and 8.8% perpetrated IPV in the 12 months before the survey. One in ten men had a score of 30 or above on the PTSD scale, 20.5% had a CESD score of 16 or more, 88.7% had experienced some form of child abuse.

Table 2 shows sociodemographic variables by IPV perpetration. More men in the ages 30–44 years reported perpetrating lifetime violence than their younger or older counterparts (p = 0.0005). There was however no significant difference in IPV perpetration in past 12 months by age (p = 0.147). There was no significant difference in perpetration of lifetime or past 12 months IPV by men’s highest educational attainment. More men who were employed in the last 12 months perpetrated violence than men who were not employed in the same period (p = 0.0007). A higher proportion of men who worked to earn income in the past 12 months perpetrated IPV in a similar period. A higher proportion of men who binge drank perpetrated IPV in lifetime (p = 0.0002) and in the past 12 months (p < 0.0001) than those who did not binge drink. A higher proportion of men who had 2 or more partners in the past 12 months perpetrated IPV in the same period than those who had less than two sexual partners (p = 0.0119).

Table 3 shows mean life experiences and gender norms/equity variables in continuous form and disaggregated by IPV perpetration. The mean scores on the child abuse scale, CESD, PTSD and Life Events Checklist for men perpetrating IPV in lifetime and past 12 months were significantly higher than those of men who never perpetrated IPV. This shows higher prevalence of child abuse history and mental ill health symptoms among perpetrators compared to non-perpetrators. The mean scores on the GEM and SRPS scales were significantly lower for men who perpetrated IPV in lifetime and in past 12 months compared to men who did not. This showed more gender equitable attitudes among non-perpetrators.

Table 4 shows factors associated with lifetime and past 12 months IPV perpetration in adjusted Odds Ratios (aOR). Lifetime IPV perpetration was associated with age, education status, child abuse, binge drinking, depressive symptoms, traumatic life events and sexual relationship power (Table 4a). Older men were more likely to perpetrate lifetime IPV compared to the 18–29 year olds. The risk for lifetime IPV perpetration increased with child trauma, traumatic life events, depression and PTSD symptom scores. Men who binge drank were 89% more likely to perpetrate IPV in lifetime compared to men who did not binge drink. Higher scores on the SRPS scales were protective of lifetime IPV perpetration.

Factors associated with IPV in past 12 months were binge drinking, PTSD and sexual relationship power (Table 4b). Men who binge drank were 81% more likely to perpetrate IPV compared to the men who did not. Risk for IPV perpetration in past 12 months increased with PTSD symptoms. Higher scores on the SRPS scale were protective of past 12 months IPV perpetration (Table 4b).

Figure 1 and Table 5 shows the results from the SEM. Child abuse has direct effects on gender attitudes, sexual relationship power and depressive symptoms. Educational status had direct effects on gender attitudes. Age had direct effects on binge drinking and PTSD. Depression was comorbid with PTSD and binge drinking: PTSD had direct effects on depression, depression had effects on binge drinking. PTSD, binge drinking and sexual relationship power had effects on past 12 months IPV. Binge drinking co-varied with gender attitudes. Gender attitudes co-varied with sexual relationship power. The final model had acceptable fit. (CFI = 0.94; TLI =0.88; RMSEA = 0.05); p value = < 0.0001).

Fig. 1
figure1

Structural pathways to men’s use of violence

Discussion

The study aimed to investigate the factors associated with men’s use of violence against intimate partners. Factors associated with lifetime perpetration included child abuse, high gender inequity attitudes, binge drinking, life traumatic events, depressive symptoms and sexual relationship power. Factors associated with recent IPV perpetration included binge drinking, PTSD symptoms and less sexual relationship power. Path modelling of variables showed that child abuse had direct effects on PTSD, depression, gender attitudes and sexual relationship power. Sexual relationship power, binge drinking, PTSD and CESD had direct effects on IPV in past 12 months.

The findings show the contribution of child abuse to IPV perpetration in a context where corporal punishment at home and in school institutions is legalized through Article 241 of the Criminal Law (Codification and Reform) Act 2004 and the Article 7 of the Children’s Act 1972 [35]. Child abuse was also associated with mental ill  health and had effects on PTSD, depressive symptoms and binge drinking, consistent with global literature on the long-term effects of child physical, sexual and emotional abuse [36,37,38,39].

Child abuse also had effects on gender attitudes and sexual relationship power. This is consistent with literature showing that men who were  abused in childhood are more likely to have witnessed parental violence and have been socialized into gender inequitable norms leading to their  use violence in their intimate  relationships [40]. These findings show that child abuse is a key determinant of negative outcomes in adult life hence is a key area of action for preventing mental ill  health, negative attitudes development and IPV perpetration. More importantly these findings show evidence of the need to change societal discourse on child beating and corporal punishment because of its negative contribution to intergenerational transmission of violence. Abolishing all forms of corporal punishment may be a good starting point towards a violence free environment. The findings also show evidence for the need to protect children from all forms of abuse including sexual abuse that have protracted effects in the life course.

Mental ill health among men was also shown to be a determinant of violence perpetration. Consistent with other research showing PTSD as a risk factor for IPV  perpetration, [9, 18, 41] we found an association between PTSD and recent IPV perpetration. There was also relatively high prevalence of depression among men in this study that was associated with lifetime perpetration of IPV but not recent IPV. The societal context of depression could have been driven by more factors than were collected in this study for example the poverty and economic recession that the country faced for over a decade. There is evidence that poverty, job losses and other economic stressors are key determinants of depression [42].

Notwithstanding, the data showed comorbidities between binge drinking and depression and that binge drinking fully-mediated the relationship with violence perpetration. Further investigations are necessary to understand these relationships because they provide an opportunity for intervening to reduce violence. The association of binge drinking with IPV perpetration can be explained by the distortion of perceptions of cues and lowering of inhibitions which lead to aggression in a relationship [43]. Considering this relationship there is potential for alcohol reduction programmes in reducing violence in intimate relationships. Health promotion geared to encourage men to seek treatment for mental ill health and counselling services are essential for violence prevention. Because the country’s health sector is struggling there will be need for the  prioritization of community based social support mechanisms to help men deal with their mental health challenges.

The data also shows that inequitable gender norms and behaviours associated with IPV are a key driver of violence perpetration. Gender norms are the result of socialization of individuals based on social expectations for appropriate behaviours of males and females. Society defines context specific models of manhood and these are passed onto boys and men through cultural processes. When norms are inequitable they negatively affect relationships with women and are often associated with partner violence [32]. Sexuality education coupled with gender transformative programmes for men and boys are critical to reduce partner violence. Existing community based gender equitable norms creation and reinforcement programmes in Zimbabwe need to be strengthened [44, 45].

Inequitable gender attitudes were also associated with sexual relationship power. The SRPS was developed to measure women’s ability to negotiate safer sex practices and HIV risk as it relates to gender-based imbalances in the relationship [33]. The association of the GEM Score with sexual relationship power shows that inequitable gender norms are important factors in sexual health decision making and HIV risky behaviours [32]. In this regard work in transforming gender attitudes of men, in addition to violence reduction, may result in healthy relationships which are empowering to female partners in terms of sexual decision-making, and reproductive health choices [10, 46]. There is also need to consider working with men as agents of social change or as champions for nurturing gender equitable attitudes through modelling gender equitable relationships for youths and other men to adopt [45].

The relationship between loss of economic power and perpetration of violence has been discussed in many settings [47]. This explanation enables us to understand our findings in the context of the Zimbabwean prolonged economic recession characterized by high unemployment and more informal than formal jobs. Such an economy has subsequently changed concepts of gender roles leading to women becoming more vulnerable to violence as men use violence instead to exert their power over women. Women have become key players in the informal sector and changed significantly their contribution to family welfare. This has led to changes in gender dynamics that has left men feeling less powerful and their manhood threatened. The loss of power by men may lead to men resorting to violence to exert this control. Qualitative work is necessary to further investigate the influences of the economy on violence in relationships.

There are several limitations to the study. The cross-sectional design limits the study in establishing temporality but the path analysis assists us to know how the factors are ordered and the directions in which variables are linked. We cannot conclude on the relationship between depression and IPV as there may be other factors associated with depression that were not measured in this study, for example, economic stressors. The observed relationships in this study are those that can be concluded based on the included variables only. The paper is based on men’s self-report data which may have been affected by response bias such as unwillingness to disclose socially undesirable behaviors or characteristics. Nevertheless, the study methodology has its strengths which include having a nationwide coverage and a community based sample with sufficient power to generalize the findings.

Conclusions

The study found high levels of lifetime male perpetration of intimate partner violence. Lifetime perpetration of IPV was associated with child abuse, high gender equity attitudes, binge drinking, life traumatic events, depressive symptoms and sexual relationship power. Factors associated with recent IPV perpetration were binge drinking, PTSD symptoms and less sexual relationship power. The causal pathway analysis found experiences of child abuse having a direct effect on PTSD, depressive symptoms, gender attitudes and sexual relationship power. PTSD, depressive symptoms, binge drinking and sexual relationship power had a direct effect on IPV in past 12 months.

The public health implications of these findings are that primary prevention of IPV perpetration must focus on reducing child abuse by addressing negative parenting practices. Secondary prevention needs to address changing gender norms, promoting responsible behaviours, gender equitable masculinities as well as addressing mental ill health symptoms and alcohol abuse.

Abbreviations

aOR:

Adjusted Odds Ratio

AUDIT:

Alcohol Use Disorders Identification Test

CES-D:

Centre for Epidemiologic Studies Depression

CFI:

Confirmatory Fit Index

CI:

Confidence level

CTQ:

Childhood Trauma Questionnaire

EA:

Enumeration area

GEMS:

Gender Equitable Men Scale

HIV:

Human immunodeficiency virus

HTQ:

Harvard Trauma Questionnaire

ID:

Identity number

IPV:

Intimate partner violence

MWAGCD:

Ministry of Women Affairs, Gender and Community Development

PDA:

Personal digital assistant

PTSD:

Post-traumatic stress disorder

RMSEA:

Root mean squared error of approximation

SEM:

Structural Equation Model

SRPS:

Sexual Relationship Power Scale

TLI:

Tucker-Lewis Index

WHO:

World Health Organization

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Acknowledgements

We are grateful to Gender Links and the Government of Zimbabwe’s Ministry of Women’s Affairs, Gender and Community Development who partnered in implementation of the survey.

Funding

We acknowledge funding from the South African Medical Research Council for this publication.

Availability of data and materials

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

Author information

Affiliations

Authors

Contributions

MM conceived and designed the study and led the data collection of the primary survey, analysis and interpretation of data, drafted the article, led the revisions and approved the version to be published. SS substantially contributed towards study design, data analysis, and interpretation of data, revision of the manuscript and approved the final version to be published.

Corresponding author

Correspondence to Mercilene Machisa.

Ethics declarations

Ethics approval and consent to participate

The study was approved by the Government of Zimbabwe’s Ministry of Women’s Affairs, Gender and Community Development in 2011. Participation in the study was voluntary and prior written informed consent was given by all participants. Interviews were conducted in privacy and participants were assured of confidentiality.

Consent for publication

Not Applicable.

Competing interests

The authors declared that they have no competing interests.

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Machisa, M., Shamu, S. Mental ill health and factors associated with men’s use of intimate partner violence in Zimbabwe. BMC Public Health 18, 376 (2018). https://doi.org/10.1186/s12889-018-5272-5

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Keywords

  • Intimate partner violence perpetration
  • Mental health
  • Gender attitudes and relationship power
  • Child abuse
  • Men