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Background: Little evidence exists about the prevalence of child sexual abuse (CSA) inflicted by different relational classes of perpetrators (e.g., parents; institutional adults; adolescents), and by individual types of perpetrators (e.g., fathers and male relatives; male teachers and male clergy; known and unknown adolescents)., Objective: To generate evidence of the prevalence of CSA by different perpetrators, and trends by victim gender and age group., Participants and Setting: The Australian Child Maltreatment Study collected information about CSA victimisation from a nationally-representative sample of 8503 individuals aged 16 and over., Methods: We analysed data about 42 perpetrator types, collapsed into eight classes. We generated national prevalence estimates of CSA inflicted by each perpetrator class and individual perpetrator type, and compared results by victim gender and age group., Results: Australian CSA prevalence was 28.5%, with the following prevalence by perpetrator classes: other known adolescents (non-romantic): 10.0%; parents/caregivers in the home: 7.8%; other known adults: 7.5%; unknown adults: 4.9%; adolescents (current/former romantic partners): 2.5%; institutional caregivers: 2.0%; siblings: 1.6%; unknown adolescents: 1.4%. Women experienced more CSA by all perpetrator classes except institutional caregivers. Age group comparison showed significant declines in CSA by parents/caregivers, and other known adults; and increases in CSA by adolescents (current/former romantic partners). Individual perpetrator type comparison showed declines in CSA by fathers, male relatives living in the home, non-resident male relatives, and other known male adults; and increases in CSA by known male adolescents, current boyfriends, and former boyfriends., Conclusions: CSA by adults has declined, indicating positive impacts of prevention efforts. However, CSA by adolescents has increased. Further declines in CSA by adults are required and possible. Targeted prevention of CSA by adolescents must be prioritised., (Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved.)

Background: Childhood maltreatment (CM) is associated with both dietary fat intake and obesity in later life. There is less information on associations with metabolic risk factors and specific types of CM such as physical, sexual and emotional abuse, as well as neglect., Aims: To assess the association between five types of self-reported CM and a range of obesity and metabolic indicators in a subsample of a birth cohort., Methods: This was a study of 1689 adults born in a major metropolitan maternity hospital in Australia and followed up 30 years later. Body mass index, bioimpedance and fasting lipid levels/insulin resistance were measured. Details on self-reported CM were collected using the Child Trauma Questionnaire. We adjusted for birth weight, parental income and relationship at participants' birth, as well as maternal age and alcohol or tobacco use. We also adjusted for participants' smoking, depression, educational level, marital and employment status at follow up., Results: One-fifth reported maltreatment (n = 362), most commonly emotional neglect (n = 175), followed by emotional abuse (n = 128), physical neglect (n = 123), sexual (n = 121) and physical abuse (n = 116). On adjusted analyses, there were significant associations for CM, particularly neglect or emotional abuse, and one or more of the following outcomes: obesity, the total cholesterol/high-density lipoprotein cholesterol (TC/HDL-C) ratio and HDL levels. Results for other outcomes were more equivocal., Conclusions: Of child maltreatment types, emotional abuse and neglect show the strongest associations with obesity and several cardiometabolic risk factors, therefore highlighting the public health importance of early intervention to reduce childhood adversity., (© 2022 The Authors. Internal Medicine Journal published by John Wiley & Sons Australia, Ltd on behalf of Royal Australasian College of Physicians.)

Background: To establish national prevalence of child maltreatment, reliable, valid and contextually appropriate measurement is needed. This paper outlines the refinement, adaptation and testing of child maltreatment sections of the Juvenile Victimization Questionnaire (JVQ)-R2 for use in the Australian context., Methods: Three phases were undertaken: 1) Conceptual analysis of the five forms of child maltreatment (physical abuse, sexual abuse, emotional or psychological abuse, neglect, and experience of domestic violence), item mapping and review, item development, and independent expert review; 2) Cognitive testing with members of the general population, and individuals who have experienced maltreatment; and 3) Pilot testing and quantitative psychometric assessment with a random sample of Australians aged 16-65+ years., Results: The final measure included a total of 17 child maltreatment screener items, assessing Physical Abuse (2 items), Sexual abuse (5 items (including 2 non-contact items and 3 contact items), Emotional Abuse (3 items), Neglect (3 items), and Experience of Domestic Violence (4 items). Screener items were also included on corporal punishment (1 item), and internet sexual victimization (2 items). The final 17-item revised JVQ had high face and conceptual validity and good internal reliability (α = 0.86 and Ω = 0.87). Test re-test reliability was moderate to high for individual screeners ranging from k = 0.45 to 0.89., Conclusions: Results indicate the Juvenile Victimization Questionnaire-R2: Adapted Version (Australian Child Maltreatment Study) is a suitable instrument for assessing population-wide prevalence of maltreatment. It is congruent with conceptual models of maltreatment and shows good reliability and validity in this Australian sample., (Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved.)

Objectives: To examine associations between child maltreatment and health service use, both overall, by type and by the number of types of maltreatment reported., Design, Setting: Cross-sectional, retrospective survey using the Juvenile Victimization Questionnaire-R2: Adapted Version (Australian Child Maltreatment Study); computer-assisted mobile telephone interviews using random digit dialling, Australia, 9 April - 11 October 2021., Participants: Australians aged 16 years or more. The target sample size was 8500 respondents: 3500 people aged 16-24 years and 1000 respondents each from the five age groups (25-34, 35-44, 45-54, 55-64, 65 years or more)., Main Outcome Measures: Self-reported health service use during the past twelve months: hospital admissions, length of stay, and reasons for admission; and numbers of consultations with health care professionals, overall and by type. Associations between maltreatment and health service use are reported as odds ratios adjusted for age group, gender, socio-economic status, financial hardship (childhood and current), and geographic remoteness., Results: A total of 8503 participants completed the survey. Respondents who had experienced child maltreatment were significantly more likely than those who had not to report a hospital admission during the preceding twelve months (adjusted odds ratio [aOR], 1.39; 95% confidence interval [CI], 1.16-1.66), particularly admission with a mental disorder (aOR, 2.4; 95% CI, 1.03-5.6). The likelihood of six or more visits to general practitioners (aOR, 2.37; 95% CI, 1.87-3.02) or of a consultation with a mental health nurse (aOR, 2.67; 95% CI, 1.75-4.06), psychologist (aOR, 2.40; 95% CI, 2.00-2.88), or psychiatrist (aOR, 3.02; 95% CI, 2.25-4.04) were each higher for people who reported maltreatment during childhood. People who reported three or more maltreatment types were generally most likely to report greater health service use., Conclusions: Child maltreatment has a major impact on health service use. Early, targeted interventions are vital, not only for supporting children directly, but also for their longer term wellbeing and reducing their health system use throughout life., (© 2023 The Authors. Medical Journal of Australia published by John Wiley & Sons Australia, Ltd on behalf of AMPCo Pty Ltd.)

Objective: To estimate associations between all five types of child maltreatment (emotional abuse, neglect, physical abuse, sexual abuse, and exposure to domestic violence) and health risk behaviours and conditions., Design, Setting, Participants: Nationally representative survey of Australian residents aged 16 years and older conducted by computer-assisted telephone interviewing., Main Outcome Measures: Associations between child maltreatment and the following health risk behaviours and conditions: current smoker, binge drinking (at least weekly in past 12 months), cannabis dependence (according to the Cannabis Severity of Dependence Scale), obesity (based on body mass index), self-harm in past 12 months, and suicide attempt in past 12 months., Results: A total of 8503 participants completed the survey. All five types of child maltreatment were associated with increased rates of all of the health risk behaviours and conditions that we considered. The strongest associations were in the youngest age group (16-24-year-olds). Sexual abuse and emotional abuse were associated with the highest odds of health risk behaviours and conditions. Cannabis dependence, self-harm and suicide attempts were most strongly associated with child maltreatment. Experiencing more than one type of child maltreatment was associated with higher rates of health risk behaviours and conditions than experiencing one type of child maltreatment., Conclusions: Child maltreatment is associated with substantially increased rates of health risk behaviours and conditions. Prevention and intervention efforts should be informed by trauma histories, and holistic psychosocial care should be incorporated into programs focusing on behaviour change., (© 2023 The Authors. Medical Journal of Australia published by John Wiley & Sons Australia, Ltd on behalf of AMPCo Pty Ltd.)

Objectives: To describe the aims, design, methodology, and respondent sample representativeness of the Australian Child Maltreatment Study (ACMS)., Design, Setting: Cross-sectional, retrospective survey; computer-assisted mobile telephone interviewing using random digit dialling (computer-generated), Australia, 9 April - 11 October 2021., Participants: People aged 16 years or more. The target sample size was 8500 respondents: 3500 people aged 16-24 years and 1000 respondents each from five further age groups (25-34, 35-44, 45-54, 55-64, 65 years or more)., Main Outcome Measures: Primary outcomes: Emotional abuse, neglect, physical abuse, sexual abuse, exposure to domestic violence during childhood, assessed with the Juvenile Victimization Questionnaire-R2 Adapted Version (Australian Child Maltreatment Study)., Secondary Outcomes: selected mental disorder diagnoses (Mini International Neuropsychiatric Interview, MINI), selected physical health conditions, health risk behaviours, health service use., Results: The demographic characteristics of the ACMS sample were similar to those of the Australian population in 2016 with respect to gender, Indigenous status, region and remoteness category of residence, and marital status, but larger proportions of participants were born in Australia, lived in areas of higher socio-economic status, had tertiary qualifications, and had income greater than $1250 per week. Population weights were derived to adjust for these differences. Associations between the number of calls required to recruit participants and maltreatment rates and health outcomes were not statistically significant., Conclusions: The ACMS provides the first reliable estimates of the prevalence of each type of child maltreatment in Australia. These estimates, and those of associated mental health and health risk behaviours reported in this supplement can inform policy and practice initiatives for reducing the prevalence of child maltreatment and its consequences. Our benchmark study also provides baseline data for repeated waves of the ACMS that will assess the effectiveness of these initiatives., (© 2023 The Authors. Medical Journal of Australia published by John Wiley & Sons Australia, Ltd on behalf of AMPCo Pty Ltd.)

Objectives: To examine the associations between experiences of child maltreatment and mental disorders in the Australian population., Design: Population-representative survey conducted by computer-assisted telephone interviewing., Setting, Participants: Australian residents aged 16 years and older., Main Outcome Measures: Mental disorder diagnoses of lifetime major depressive disorder, current alcohol use disorder (mild, moderate and severe), current generalised anxiety disorder and current post-traumatic stress disorder., Results: More than one in three Australians (3606/8503 surveyed participants; 38.0%; 95% CI, 36.7-39.3%) met the diagnostic criteria for a mental disorder. The prevalence of mental disorders in non-maltreated participants was 21.6% (95% CI, 19.9-23.3%; n = 851). This increased to 36.2% (95% CI, 33.5-38.9%; n = 764) for those who experienced a single type of maltreatment and 54.8% (95% CI, 52.6-56.9%; n = 1991) for participants who experienced multi-type maltreatment. Compared with non-maltreated Australians, maltreated participants had about three times the odds of any mental disorder (odds ratio [OR], 2.82; 95% CI, 2.47-3.22), generalised anxiety disorder (OR, 3.14; 95% CI, 2.48-3.97), major depressive disorder (OR, 3.19; 95% CI, 2.68-3.80) and severe alcohol use disorder (OR, 2.62; 95% CI, 1.83-3.76), and almost five times the odds of post-traumatic stress disorder (OR, 4.60; 95% CI, 3.00-7.07). Associations between experiences of child maltreatment and mental disorders were strongest for sexual abuse, emotional abuse and multi-type maltreatment. The strength of the associations did not differ by gender. Adjustment for childhood and current financial hardship and for current socio-economic status did not significantly attenuate the associations., Conclusions: Mental disorders are significantly more likely to occur in individuals who experience child maltreatment, particularly multi-type maltreatment. Prevention of child maltreatment provides an opportunity to substantially reduce the prevalence of mental illness and improve the health of the Australian population., (© 2023 The Authors. Medical Journal of Australia published by John Wiley & Sons Australia, Ltd on behalf of AMPCo Pty Ltd.)

Objectives: To estimate the prevalence in Australia of each type of child maltreatment; to identify gender- and age group-related differences in prevalence., Design, Setting: Cross-sectional national survey; mobile telephone interviews using random digit dialling (computer-generated), Australia, 9 April - 11 October 2021. Retrospective self-report data using validated questionnaire (Juvenile Victimisation Questionnaire-R2 Adapted Version (Australian Child Maltreatment Study)., Participants: People aged 16 years or more. The target sample size was 8500 respondents: 3500 people aged 16-24 years and 1000 respondents each from five further age groups (25-34, 35-44, 45-54, 55-64, 65 years or more)., Main Outcome Measures: Proportions of respondents reporting physical abuse, sexual abuse, emotional abuse, neglect, and exposure to domestic violence to age 18 years, assessed with the Juvenile Victimization Questionnaire-R2 Adapted Version (Australian Child Maltreatment Study), overall and by gender and age group, and weighted to reflect characteristics of the Australian population aged 16 years or more in 2016., Results: Complete survey data were available for 8503 eligible participants (14% response rate). Physical abuse was reported by 32.0% of respondents (95% confidence interval [CI], 30.7-33.3%), sexual abuse by 28.5% (95% CI, 27.3-29.8%), emotional abuse by 30.9% (95% CI, 29.7-32.2%), neglect by 8.9% (95% CI, 8.1-9.7%), and exposure to domestic violence by 39.6% (95% CI, 38.3-40.9%). The proportions of respondents who reported sexual abuse, emotional abuse, or neglect were each statistically significantly larger for women than men. The reported prevalence of physical abuse by respondents aged 16-24 years was lower than for those aged 25-34 years, and that of sexual abuse was lower than for those aged 35-44 years, suggesting recent declines in the prevalence of these maltreatment types., Conclusions: Child maltreatment is common in Australia, and larger proportions of women than men report having experienced sexual abuse, emotional abuse, and neglect during childhood. As physical and sexual abuse may have declined recently, public health policy and practice may have positive effects, justifying continued monitoring and prevention activities., (© 2023 The Authors. Medical Journal of Australia published by John Wiley & Sons Australia, Ltd on behalf of AMPCo Pty Ltd.)

Objectives: To determine the prevalence in Australia of multi-type child maltreatment, defined as two or more maltreatment types (physical abuse, sexual abuse, emotional abuse, neglect, or exposure to domestic violence) and to examine its nature, family risk factors, and gender and age cohort differences., Design: Retrospective cross-sectional survey using a validated questionnaire., Setting and Participants: Mobile phone random digit-dial sample of the Australian population aged 16 years and older., Main Outcome Measures: National estimates of multi-type child maltreatment up to age 18 years using the Juvenile Victimisation Questionnaire-R2: Adapted Version (Australian Child Maltreatment Study)., Results: Of 8503 participants, 62.2% (95% CI, 60.9-63.6%) experienced one or more types of child maltreatment. Prevalence of single-type maltreatment was 22.8% (95% CI, 21.7-24.0%), whereas 39.4% (95% CI, 38.1-40.7%) of participants reported multi-type maltreatment and 3.5% (95% CI, 3.0-4.0%) reported all five types. Multi-type maltreatment was more common for gender diverse participants (66.1% [95% CI, 53.7-78.7%]) and women (43.2% [95% CI, 41.3-45.1%]) than for men (34.9% [95% CI, 33.0-36.7%]). Multi-type maltreatment prevalence was highest for those aged 25-44 years. Family-related adverse childhood experiences - especially mental illness and alcohol or substance misuse - increased risk. Exposure to domestic violence was the maltreatment type most often present in multi-type maltreatment patterns., Conclusions: Multi-type child maltreatment is prevalent in Australia and more common in women and gender diverse individuals. Child protection services, health practitioners, and prevention and intervention services must assess and manage multi-type maltreatment in children and address its health consequences across the lifespan. Public health policy should consider prevention services or strategies that target multi-type child maltreatment., (© 2023 The Authors. Medical Journal of Australia published by John Wiley & Sons Australia, Ltd on behalf of AMPCo Pty Ltd.)

Background: The long-term mental and physical health consequences of childhood maltreatment have been well documented. Less known are the longer-term consequences of childhood maltreatment, specifically the extent to which childhood maltreatment predicts adult life success., Objectives: To prospectively assess the extent to which childhood experiences of physical, sexual, emotional abuse and childhood neglect predict life success at 30 years of age., Participants and Setting: Data are from the Mater-University of Queensland Study of Pregnancy (MUSP), a pre-birth cohort study which follows children from conception to 30 years of age., Methods: Details of childhood maltreatment are from two sources; child safety agency notifications (and substantiations) linked to the survey data with self-reports of childhood experiences of maltreatment obtained at the 30-year follow-up using the Child Trauma Questionnaire (CTQ). Life success is a 9-item composite measure (alpha = 0.76) obtained at the 30-year follow-up. We use logistic regression models (with control for covariates) to examine the association between overall as well as specific forms of childhood maltreatment on adult life success. We further test these models using different cut-offs and propensity analyses to adjust for loss to follow-up., Results: Childhood maltreatment whether measured by agency report or self-report predicts overall low life success; agency substantiation OR = 1.88(1.14,3.08) & self-report OR = 2.60 (2.10,3.25). Self-report physical abuse, OR = 2.37(1.72,3.28); sexual abuse, OR = 2.85(2.05,3.96); emotional abuse, OR = 2.53(1.85,3.45) and neglect, OR = 2.36(1.83,3.03) all predict higher levels of low life success., Conclusions: Our findings suggest that the long-term consequences of childhood maltreatment extend to a wide range of day-to-day circumstances and extend into mid- to later life.

A range of adult health outcomes have been linked to early childhood adversities. These early adversities include parental marital breakdown and family economic disadvantage. Childhood experiences of maltreatment have also been linked to a variety of adult health outcomes. As both childhood adversities and child maltreatment often co-occur, we examine whether childhood adversities at 3 stages of the child's early life course predict any of nine adult mental health outcomes controlling for past experiences of child trauma (maltreatment). Data are from a long running birth cohort study, the Mater-University of Queensland Study of Pregnancy (MUSP). We use bivariate and multinomial logistic regression with adjustment for confounding, to predict adult outcomes. Experiences of recent life events in pregnancy appear to be unrelated to adult mental health. Recent life events experienced at the 5-year follow-up independently predicts lifetime ever depression and cannabis use disorder. Experiences of recent life events at 14-years of age predict lifetime ever depression, cannabis and amphetamine use in adulthood. Our findings support early childhood interventions which should be supplemented with a focus on later childhood and the adolescent period of development. Interventions should also focus on the broader social and demographic context within which children are born. Efforts to reduce the occurrence and consequences of childhood maltreatment should be given primary attention in order to reduce the childhood factors contributing to adult mental illness., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Ltd. All rights reserved.)

A large number of early life exposures predict child maltreatment. Using data from a 30-year birth cohort study we examine 12 early life course risk factors of four types of self-reported childhood maltreatment recalled at the 30-year follow-up. Of the 7223 children in the sample at birth, 2425 responded to the Child Trauma Questionnaire at the 30-year follow-up. On adjusted analysis being a teenage mother predicts childhood physical and sexual abuse, as well as child neglect. More numerous maternal marital partner changes in the 5 years after the birth predict offspring experiences of emotional abuse, sexual abuse and childhood neglect. Policy responses should focus on the broad social context in which children are reared as the most effective approach to reducing the high level of childhood abuse and neglect., (© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)

Epidemiological surveys measuring the prevalence of child maltreatment generate essential knowledge that is required to enhance human rights, promote gender equality, and reduce child abuse and neglect and its effects. Yet, evidence suggests Institutional Review Boards (IRBs) may assess the risk of these studies using higher than normal thresholds, based on a perception they may cause high distress to participants. It is essential for IRBs and researchers to have an accurate understanding of the nature and extent of participant distress associated with these studies, and of the duties of researchers towards survey participants, so that meritorious research is endorsed and duties to participants discharged. Assessment by IRBs of the ethics of such research must be appropriately informed by scientific evidence, ethical principles, and legal requirements. This article adds to knowledge by considering participant distress in child maltreatment surveys and its appropriate ethical and operational treatment. We provide an updated overview of scientific evidence of the frequency and severity of distress in studies of child maltreatment, a review of ethical requirements including a focus on beneficence and participant welfare, and a new analysis of researchers' legal duties towards participants. Our analyses demonstrate that participant distress is infrequent and transitory, that researchers can satisfy ethical requirements towards participants, and that legal liability does not extend to emotional distress. Informed by these bodies of knowledge, we distil key principles of good epidemiological practice to provide solutions to operational requirements in these surveys, which both fulfil ethical requirements to participants, and demonstrate trauma-informed practice., (Copyright © 2021 The Authors. Published by Elsevier Ltd.. All rights reserved.)

Background: There is little known about how two sources of child maltreatment reports correspond, specifically for emotional, physical, sexual abuse and emotional or physical neglect., Objective: To compare agency and self-reports of child maltreatment and determine whether they are predicted by similar early life course adverse experiences. Participants Data are taken from a long running birth cohort study (Mater-University of Queensland Study of Pregnancy - MUSP). Mothers (N=7223) were recruited in 1981-83 and their children were followed-up 30 years later (2010-14). In 2000 data from the relevant child protection agency were accessed and linked to the survey data. Setting Consecutive women giving birth to a live singleton baby at a major obstetrical service in Brisbane, Australia were recruited and both mother and child were repeatedly follow-up over a 30 year period. Methods Birth cohort study with data linkage of child protection agency records and self-report survey data (using the Childhood Trauma Questionnaire - CTQ) of childhood maltreatment experiences. We compare reports of emotional, physical and sexual abuse and neglect using agency and self-reports (Cramer's V and kappa)., Results: Most children who are notified cases of maltreatment subsequently self-report they experienced little or no maltreatment in childhood. Most children who report experiencing severe maltreatment have not previously been notified to the protection agency. Teenage mothers have children who are notified 2.89 (1.52, 5.52) times, self-report 2.01 (1.31, 3.09) times and both notified and self-report 3.61 (2.26, 6.10) times more than their older comparison mothers., Conclusions: Different methods of assessing maltreatment identify different subsets of those children who have experienced maltreatment., (Copyright © 2020 Elsevier Ltd. All rights reserved.)

Child maltreatment is a widespread public health problem associated with a range of mental health disorders later in life. In order to effectively address these disorders, there is a need to understand more about the mental health consequences of different types of child maltreatment. This study examines the associations between prospectively substantiated child maltreatment (ages 0-14 y) and reports of hallucinations and delusional experiences at 21 years after birth. As well, we examined 12-month and lifetime psychotic disorders using data from a longitudinal birth cohort. The study comprised 3752 participants from the Mater-University of Queensland Study of Pregnancy, a prospective Australian prebirth cohort study. Psychotic experiences and 12-month and lifetime psychosis were measured using the Achenbach Young Adults Self-Report, the Peter's Delusions Inventory, and Composite International Diagnostic Interview at the 21-year follow-up. In adjusted analyses, those children who had experienced any maltreatment and who were emotionally abused and neglected were more likely to report (1) hallucinations and lifetime delusional experiences and (2) more likely to experience lifetime psychosis than their nonabused counterparts. In expanded models, those exposed to multiple forms of maltreatment, in particular with emotional abuse and neglect, had an increased likelihood of hallucinations and delusional experiences. There is an association between child maltreatment, especially emotional abuse and neglect, and later hallucinations, delusional experiences, and psychosis. It is, however, relevant to note that the vast majority of children experiencing childhood maltreatment do not appear to develop psychotic experiences or psychotic disorder. Further research to determine the reasons for highly variable outcomes of child maltreatment is warranted., (© The Author 2017. Published by Oxford University Press on behalf of the Maryland Psychiatric Research Center. All rights reserved. For permissions, please email: journals.permissions@oup.com.)

Child maltreatment is a complex phenomenon, with four main types (childhood sexual abuse, physical abuse, emotional abuse, and neglect) highly interrelated. All types of maltreatment have been linked to adverse health consequences and exposure to multiple forms of maltreatment increases risk. In Australia to date, only burden attributable to childhood sexual abuse has been estimated. This study synthesized the national evidence and quantified the burden attributable to the four main types of child maltreatment. Meta-analyses, based on quality-effects models, generated pooled prevalence estimates for each maltreatment type. Exposure to child maltreatment was examined as a risk factor for depressive disorders, anxiety disorders and intentional self-harm using counterfactual estimation and comparative risk assessment methods. Adjustments were made for co-occurrence of multiple forms of child maltreatment. Overall, an estimated 23.5% of self-harm, 20.9% of anxiety disorders and 15.7% of depressive disorders burden in males; and 33.0% of self-harm, 30.6% of anxiety disorders and 22.8% of depressive disorders burden in females was attributable to child maltreatment. Child maltreatment was estimated to cause 1.4% (95% uncertainty interval 0.4-2.3%) of all disability-adjusted life years (DALYs) in males, and 2.4% (0.7-4.1%) of all DALYs in females in Australia in 2010. Child maltreatment contributes to a substantial proportion of burden from depressive and anxiety disorders and intentional self-harm in Australia. This study demonstrates the importance of including all forms of child maltreatment as risk factors in future burden of disease studies., (Copyright © 2015 Elsevier Ltd. All rights reserved.)

This study examined rates of mental health disorders and health risk behaviors in people with diverse gender identities and associations with five types of child maltreatment. We used data from the Australian Child Maltreatment Study (ACMS), a nationally representative survey of Australian residents aged 16 years and more, which was designed to understand the experience of child maltreatment (physical abuse, sexual abuse, emotional abuse, neglect, exposure to domestic violence). Mental disorders—major depressive disorder, generalized anxiety disorder (GAD), alcohol use disorder, post-traumatic stress disorder (PTSD), and health risk behaviors—smoking, binge drinking, cannabis dependence, self-harm, and suicide attempt in the past 12 months were assessed. People with diverse gender identities who experienced child maltreatment were significantly more likely to have GAD (43.3%; 95% CI [30.3, 56.2]) than those who had experienced child maltreatment who were either cisgender men (13.8%; [12.0, 15.5]) or cisgender women (17.4%; [15.7, 19.2]). Similarly, higher prevalence was found for PTSD (21.3%; [11.1, 31.5]), self-harm (27.8%; [17.1, 38.5]) and suicide attempt (7.2%; [3.1, 11.3]) for people with diverse gender identities. Trauma-informed approaches, attuned to the high likelihood of any child maltreatment, and the co-occurrence of different kinds may benefit people with diverse gender identities experiencing GAD, PTSD, self-harm, suicidal behaviors, or other health risk behaviors. [ABSTRACT FROM AUTHOR]