Gender Division of Housework and Intimate Partner Violence Among Mothers of Toddlers During the COVID-19 Pandemic: Findings from the 2019 Rio Grande (Brazil) Birth Cohort.

During the COVID-19 pandemic, we evaluated the association between gender division of housework and intimate partner violence (IPV) victimization in a population-based cohort of mothers. We collected data on psychological, physical, and sexual IPV using an adapted version of the World Health Organization Violence Against Women instrument and division of housework using a validated questionnaire. We used logistic regression to calculate adjusted odds ratios. We found that in mothers who reported an unequal gender division of housework (higher load), the odds of suffering psychological, physical, or sexual IPV were higher during the first and second years of the pandemic.

The association between maternal fears about their infant/toddler during the COVID-19 pandemic and depression and anxiety: a birth cohort study

Objective: To assess the association between maternal fears about their infant/toddler and depression and anxiety during the COVID-19 pandemic. Methods: In 2019, all mothers who gave birth in hospitals in Rio Grande, RS, Brazil were asked to respond to a standardized questionnaire (baseline). We followed them between May-June 2020 (first follow-up point), August-December 2020 (second follow-up point), and from October 2021 to March 2022 (third follow-up point), and asked them if they were: (1) afraid that their infant/toddler would become infected with COVID or get sick (yes/no), (2) afraid that they would contaminate their own child with COVID, and/or (3) worried about the pandemic's effects on their child's future. At baseline and at all follow-up points, we assessed depressive symptoms using the Edinburgh Postnatal Depression Scale and anxiety symptoms using the Generalized Anxiety Disorder Scale, creating symptom trajectories using group-based trajectory modelling. We used multinomial logistic regression to calculate adjusted relative risk ratios (RRR). Results: A total of 1,296 mothers participated. Worrying about the pandemic's effects on their child's future and the fear of contaminating their own child with COVID-19 increased the risk of raising depressive symptoms to a clinical level (RRR = 4.97, 95%CI 2.32-10.64 and RRR = 3.87, 95%CI 1.58-9.47, respectively) and anxiety to a moderate level (RRR = 2.91, 95%CI 1.69-5.01 and RRR = 1.86, 95%CI 1.03-3.35, respectively). Conclusion: Fear for their children increased maternal depressive and anxiety symptoms during the pandemic.

The association between maternal fears about their infant/ toddler during the COVID-19 pandemic and depression and anxiety: a birth cohort study.

OBJECTIVE: To assess the association between maternal fears about their infant/toddler and depression and anxiety during the COVID-19 pandemic. METHODS: In 2019, all mothers who gave birth in hospitals in Rio Grande, RS, Brazil were asked to respond to a standardized questionnaire (baseline). We followed them between May-June 2020 (first follow-up point), August-December 2020 (second follow-up point), and from October 2021 to March 2022 (third follow-up point), and asked them if they were: (1) afraid that their infant/toddler would become infected with COVID or get sick (yes/no), (2) afraid that they would contaminate their own child with COVID, and/or (3) worried about the pandemic's effects on their child's future. At baseline and at all follow-up points, we assessed depressive symptoms using the Edinburgh Postnatal Depression Scale and anxiety symptoms using the Generalized Anxiety Disorder Scale, creating symptom trajectories using group-based trajectory modelling. We used multinomial logistic regression to calculate adjusted relative risk ratios (RRR). RESULTS: A total of 1,296 mothers participated. Worrying about the pandemic's effects on their child's future and the fear of contaminating their own child with COVID-19 increased the risk of raising depressive symptoms to a clinical level (RRR = 4.97, 95%CI 2.32-10.64 and RRR = 3.87, 95%CI 1.58-9.47, respectively) and anxiety to a moderate level (RRR = 2.91, 95%CI 1.69-5.01 and RRR = 1.86, 95%CI 1.03-3.35, respectively). CONCLUSION: Fear for their children increased maternal depressive and anxiety symptoms during the pandemic.

Are trajectories of depressive symptoms during the first half of drug-sensitive pulmonary tuberculosis treatment associated with loss to follow-up? A secondary analysis of longitudinal data.

OBJECTIVE: The objective of this study was to identify trajectories of depressive symptoms (DSs) during the first half of drug-sensitive pulmonary tuberculosis (PTB) treatment and examine their association with loss to follow-up (LTFU) in the second half. DESIGN: This study involved a secondary analysis of longitudinal data to identify potential trajectories of DS and their relationship with LTFU. SETTING: The study was conducted in first and second-level health centres located in San Juan de Lurigancho, Lima, Peru. PARTICIPANTS: Anonymised data from 265 individuals, including monthly measures of DSs from diagnosis to the completion of treatment, initiation of treatment for multidrug resistant TB, LTFU or death, were collected. RESULTS: Three trajectories were identified: 'declining', 'growth' and 'high'. These trajectories were observed in 182 (68.7%), 53 (20%) and 30 (11.3%) of the 265 individuals, respectively, during the first half of PTB treatment. Compared with those with a 'declining' trajectory, individuals with a 'growth' trajectory had a higher likelihood of experiencing LTFU during the second half of PTB treatment, after controlling for sociodemographic factors and at least weekly alcohol use (OR 3.9; 95% CI 1.09 to 13.97, p=0.036). CONCLUSIONS: The findings suggest that a trajectory of increasing DSs during the first half of PTB treatment is associated with a higher risk of LTFU during the second half.

Sleep and its association with depressive and anxiety symptoms during the last weeks of pregnancy: A population-based study.

OBJECTIVE: To evaluate the association between sleep characteristics and depressive and anxiety symptoms during the immediate postpartum period. METHODS: People who had hospital births during 2019 in the municipality of Rio Grande (southern Brazil) were assessed with a standardized questionnaire concerning sociodemographic (eg, age and self-reported skin color) and health-related variables (eg, parity and stillbirth) (n = 2314) 24-48 hours after birth. We used the Munich Chronotype Questionnaire to assess sleep latency, inertia, duration, and chronotype; the Edinburgh Postpartum Depression Scale for depressive symptoms; and the General Anxiety Disorder 7-Item Scale to evaluate anxiety symptoms. We used logistic regression models to calculate odds ratios. RESULTS: The prevalence of depressive symptoms was 13.7%, and of anxiety symptoms was 10.7%. Depressive symptoms were more likely in those with vespertine chronotype (odds ratios = 1.63; 95% CI: 1.14-2.35) and those with a sleep latency of more than 30 minutes (OR = 2.36; 95% CI: 1.68-3.32). The probability of depressive symptoms decreased by 16% for each additional hour of sleep (OR = 0.84; 95% CI: 0.77-0.92). Sleep inertia of 11-30 minutes increased the probability of anxiety on free days (OR = 1.73; 95% CI: 1.27-2.36) and increased the probability of depressive (OR = 2.68; 95% CI: 1.82-3.83) and anxiety symptoms (OR = 1.69; 95%CI: 1.16-2.44) on workdays. CONCLUSION: Participants with vespertine chronotype or shorter sleep duration were more likely to have depressive symptoms. Those who took more time to fall asleep or get out of bed were more likely to have both anxiety and depressive symptoms, but the association was stronger for depressive symptoms.

Effect of preterm birth on growth and blood pressure in adulthood in the Pelotas 1993 cohort.

BACKGROUND: Preterm birth has been associated with increased risk of hypertension and cardiovascular disease later in adulthood, attributed to cardiovascular and metabolic alterations in early life. However, there is paucity of evidence from low- and middle-income countries (LMICs). METHODS: We investigated the differences between preterm (<37 weeks gestational age) and term-born individuals in birth length and weight as well as adult (18 and 20 years) height, weight and blood pressure in the Brazilian 1993 Pelotas birth cohort using linear regressions. Analyses were adjusted for the maternal weight at the beginning of pregnancy and maternal education and family income at childbirth. Additional models were adjusted for body mass index (BMI) and birthweight. Separate analyses were run for males and females. The complete sample was analysed with an interaction term for sex. RESULTS: Of the 3585 babies included at birth, 3010 were followed up in adulthood at 22 years. Preterm participants had lower length and weight at birth. This difference remained for male participants in adulthood, but female participants were no shorter than their term counterparts by 18 years of age. At 22 years, females born preterm had lower blood pressures (systolic blood pressure -1.00 mmHg, 95%CI -2.7, 0.7 mmHg; diastolic blood pressure -1.1 mmHg, 95%CI -2.4, 0.3 mmHg) than females born at term. These differences were not found in male participants. CONCLUSIONS: In this Brazilian cohort we found contrasting results regarding the association of preterm birth with blood pressure in young adulthood, which may be unique to an LMIC.

Combining cash transfers and cognitive behavioral therapy to reduce antisocial behavior in young men: A mediation analysis of a randomized controlled trial in Liberia.

BACKGROUND: Interventions that combine cognitive behavioral therapy (CBT) with unconditional cash transfers (UCT) reduce the risk of antisocial behavior (ASB), but the underlying mechanisms are unclear. In this paper, we test the role of psychological and cognitive mechanisms in explaining this effect. We assessed the mediating role of executive function, self-control, and time preferences. METHODS: We used data from the Sustainable Transformation of Youth in Liberia, a community-based randomized controlled trial of criminally engaged men. The men were randomized into: Group-1: control (n = 237); and Group-2: CBT+UCT (n = 207). ASB was measured 12-13 months after the interventions were completed, and the following mediators were assessed 2-5 weeks later: (i) self-control, (ii) time preferences and (iii) executive functions. We estimated the natural direct effect (NDE) and the natural indirect effect (NIE) of the intervention over ASB. RESULTS: Self-control, time preferences and a weighted index of all three mediators were associated with ASB scores, but the intervention influenced time preferences only [B = 0.09 95%CI (0.03; 0.15)]. There was no evidence that the effect of the intervention on ASB was mediated by self-control [BNIE = 0.007 95%CI (-0.01; 0.02)], time preferences [BNIE = -0.02 95%CI (-0.05; 0.01)], executive functions [BNIE = 0.002 95%CI (-0.002; 0.006)] or the weighted index of the mediators [BNIE = -0.0005 95%CI (-0.03; 0.02)]. CONCLUSIONS: UCT and CBT lead to improvements in ASB, even in the absence of mediation via psychological and cognitive functions. Findings suggest that the causal mechanisms may involve non-psychological pathways.

Child and Maternal Mental Health Before and During the COVID-19 Pandemic: Longitudinal Social Inequalities in a Brazilian Birth Cohort.

OBJECTIVE: The coronavirus disease 2019 (COVID-19) pandemic has caused major stress for families and children, particularly in the context of prolonged school closures. Few longitudinal studies are available on young children's mental health, including data both before and during the pandemic. This study examined experiences that might increase risk for mental health problems among caregivers and young children during the COVID-19 pandemic and inequalities driven by pre-pandemic disadvantage. METHOD: This prospective, population-based birth cohort study in Pelotas, Brazil, analyzed 2,083 children and caregivers with data from before the pandemic in 2019, when children were 4 years old, and again in 2020, when schools were closed for a long period during the pandemic. Child conduct problems, emotional problems, and hyperactivity-inattention problems were assessed using the Strengths and Difficulties Questionnaire. Family financial hardship, relationship difficulties, caregiver mental health, parenting practices, and child fears and isolation were considered as potential risk factors. RESULTS: Across the whole population, the only significant increase in mental health problems from before to during the pandemic was found for maternal depression. However, poorer families were at far greater risk of experiencing serious financial problems, food shortages, increased conflict in adult relationships, parenting problems, and child worries about food availability during the pandemic. In turn, these difficulties were associated with increases in multiple mental health problems for both caregivers and children. Increased child mental health problems were most strongly associated with concurrent maternal anxiety (ß > 0.20, p < .001, for each of child conduct, emotional, and hyperactivity problems), maternal depression (ß = 0.26, p < .001, for child emotional problems), partner criticism (ß = 0.21, p < .001, for child conduct problems), and harsh parenting (ß > 0.20, p < .001, for both child conduct and hyperactivity problems). Child worry about COVID-19 was associated with increased emotional problems (ß = 0.14, p < .001), but children's isolation was not associated with their mental health. CONCLUSION: Overall, the impact of the COVID-19 pandemic on mental health is a mixed picture, but for families in poverty, marked material and interpersonal difficulties were associated with increases in mental health problems among children and caregivers.

Going digital: opportunities and barriers in the use of technology for health research.

Digital health refers to the use of novel information com-munication technologies in healthcare. The use of these technologies could positively impact public health and health outcomes of populations by generating timely data, and facili-tating the process of data collection, analysis, and knowledge translation. Using selected case studies, we aim to describe the opportunities and barriers in the use of technology applied to health-related research. We focus on three areas: strategies to generate new data using novel data collection methods, strategies to use and analyze existing data, and using digital health for health-related interventions. Exemplars from seven countries are provided to illustrate activity across these areas. Although the use of health-related technologies is increasing, challenges remain to support their adoption and scale-up -especially for under-served populations. Research using digital health approaches should take a user-centered design, actively working with the population of interest to maximize their uptake and effectiveness.

Association between food insecurity and major depressive episodes amid Covid-19 pandemic: results of four consecutive epidemiological surveys from southern Brazil.

OBJECTIVE: To assess the association between household food insecurity (FI) and major depressive episodes (MDE) amid Covid-19 pandemic in Brazil. DESIGN: Cross-sectional study carried out with data from four consecutive population-based studies. SETTING: The study was conducted between May and June 2020, in Bagé, a Brazilian southern city. Household FI was measured using the short-form version of the Brazilian Food Insecurity Scale. Utilising the Patient Health Questionnaire-9, we used two different approaches to define MDE: the cut-off point of ≥ 9 and the diagnostic criteria proposed by the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR). Association between FI and MDE was analysed using crude and adjusted Poisson regression models. PARTICIPANTS: 1550 adults (≥ 20 years old). RESULTS: The prevalence of household FI was 29·4 % (95 % CI 25·0, 34·4). MDE prevalence varied from 4·4 % (95 % CI 3·1, 6·0), when we used the DSM-IV-TR criteria to define this condition, to 9·6 % (95 % CI 7·3, 12·5) of the sample, when we used the cut-off point of ≥ 9 as definition. The prevalence of MDE was more than two times higher in those individuals living with FI, independent of the criteria adopted to define the outcome. Adjustment for potential confounders did not change the association's magnitude. CONCLUSIONS: Household FI has been positively associated with MDE amid Covid-19 pandemic, independent of socio-demographic characteristics of participants. Actions are needed to warrant basic living conditions to avoid FI and hunger and its consequences for the Brazilian population, especially those consequences linked to mental health disorders.

The effects of persistent sleep disturbances during early childhood over adolescent ADHD, and the mediating effect of attention-related executive functions: Data from the 2004 Pelotas Birth Cohort.

OBJECTIVE: Investigate effects of persistent sleep disturbances during early childhood over ADHD during the adolescence, and the potential attention-related executive functions mediating this effect. METHODS: We used data from the 2004 Pelotas Birth Cohort. Children's Sleep disturbances were reported by their mothers at 12, 24, and 48 months of age, whereas the Test-of-Everyday-Attention-for-Children (TEA-Ch) and the Development and Well Being Assessment (DAWBA) were applied at 11 years of age to evaluate attention-related executive functions and ADHD, respectively. Persistent sleep problems were defined as reporting have two or more points of difficulty to sleep, nightmares, restless sleeps, and/or <10h/24h sleep duration. Logistic regression and mediation models were used, adjusting for maternal and child sociodemographic, behavior and health related variables. RESULTS: The highest prevalence of adolescent ADHD (15.4%) was on the group who reported having nightmares at 2,4 and 6 years. In adjusted models, we observed an odd of ADHD in the adolescence 2.26 higher in those who reported persistent nightmares (CI95% 1.33, 4.01) compared to those reported transitory or no nightmares. Persistent difficulty to sleep (OR=1.74 CI95% 1.13, 2.66) and restless sleep (OR=1.80, CI95% 1.23, 2.64) during childhood also increased ADHD odds at 11 years. No indirect effect through attention related executive functions was found using mediating models. DISCUSSION: Persistent early sleep disturbances may increase odds of ADHD among adolescents and could be consider as early marker of such disorder, specially nightmares problems. These effects were not mediated by attention-related executive functions. Nevertheless, we had 75% of cohort inception response.

A WhatsApp-Based Intervention to Improve Maternal Social Support and Maternal-Child Health in Southern Brazil: The Text-Message Intervention to Enhance Social Support (TIES) Feasibility Study.

Participatory learning and action cycles with women's groups have been recommended by the WHO to promote maternal and newborn health, but few studies have tested its feasibility and acceptability in mobile health (mHealth) interventions among mothers of toddlers. This was a mixed-method feasibility assessment of an 8-week WhatsApp-based maternal support group for mothers of toddlers (12-18 months of age) enrolled in a birth cohort study in Southern Brazil. Daily messages and weekly activities were sent by moderators to promote maternal-child outcomes: child nutrition, child sleep, nurturing care, and maternal psychosocial well-being (assessed pre- and post-intervention via self-reported questionnaire). The implementation and engagement of the mothers in the program were assessed by message extraction. Acceptability was evaluated through in-depth interviews (n = 5) and open-ended surveys (n = 10). 1481 messages were exchanged in 3 WhatsApp groups (n = 30 mothers). Mothers were most active on weekdays (68.6% of messages sent on Tuesdays and 72.6% on Thursdays), afternoons (2:00-4:00pm), and evenings (9:00-11:00 pm). Engagement was higher at weeks 1-4. Mothers enjoyed and considered topics relevant. Group interaction was perceived as low, which influenced their participation. The prevalence of depression symptoms decreased from pre- to post-intervention (9% to 5%; P = .04). A moderated mobile-based support group for mothers of toddlers was feasible. mHealth services to promote maternal support are a promising strategy to improve maternal-child outcomes, but engagement and use of the service remains a challenge. Program managers should work with community members to identify ways to support engagement and participation throughout the intervention.

Maternal mental health before and during the COVID-19 pandemic in the 2019 Rio Grande birth cohort.

OBJECTIVE: To describe and compare measures of maternal depression, anxiety, and posttraumatic stress symptoms before and during the coronavirus disease 2019 (COVID-19) pandemic in a Brazilian birth cohort. METHODS: All hospital births occurring in the municipality of Rio Grande (southern Brazil) during 2019 were identified. Mothers were invited to complete a standardized questionnaire on sociodemographic and health-related characteristics. Between May and July 2020, we tried to contact all cohort mothers of singletons, living in urban areas, to answer a standardized web-based questionnaire. They completed the Edinburgh Postnatal Depression Scale (EPDS) and Generalized Anxiety Disorder 7-item (GAD-7) in both follow-ups, and the Impact of Event Scale (IES) in the online follow-up. RESULTS: We located 1,136 eligible mothers (n=2,051). Of those, 40.5% had moderate to severe stress due to the current pandemic, 29.3% had depression, and 25.9% had GAD. Mothers reporting loss of income during the pandemic (57.2%) had the highest proportions of mental health problems. Compared to baseline, the prevalence of depression increased 5.7 fold and that of anxiety increased 2.4-fold during the pandemic (both p < 0.001). CONCLUSION: We found a high prevalence of personal distress due to the ongoing COVID-19 pandemic, and a clear rise in both maternal depression and anxiety.

Role of ultra-processed food in fat mass index between 6 and 11 years of age: a cohort study.

BACKGROUND: Ultra-processed food consumption and obesity have been highlighted as an important relationship to public health. We aimed to evaluate the association between ultra-processed food consumption and body fat from 6 to 11 years of age. METHODS: We assessed the association between ultra-processed food consumption (from food frequency questionnaires) and body fat (measured by air displacement plethysmography) between 6 and 11 years of age among participants of the Pelotas-Brazil 2004 Birth Cohort. The NOVA classification was used to classify foods according to the processing degree. Body fat was evaluated relative to the height using fat mass index (FMI). Generalized estimating equations were used to answer the main research question and mediation analyses were run to assess the direct and indirect effect of ultra-processed food in body fat. RESULTS: At fully adjusted analysis, an increase of 100 g in contribution from ultra-processed food to daily food intake at between 6 and 11 years of age was associated with a gain of 0.14 kg/m² in FMI in the same period; 58% of the total effect of ultra-processed food intake at 6 years (in grams) over the change in FMI from 6 to 11 years was mediated by its calorie content. CONCLUSIONS: Ultra-processed food consumption was associated with an increase in body fat from childhood to early adolescence, and this association was not just due to the effect of ultra-processed food on calorie content.

Obesity and ADHD: Exploring the role of body composition, BMI polygenic risk score, and reward system genes.

The association between obesity and attention-deficit hyperactivity disorder (ADHD) has been extensively reported in the literature. However, the potential mechanisms underlying this association are not completely understood. This study aimed to evaluate the association between body composition and ADHD and explore the possible genetic mechanisms involved. We used data from the 1982 Pelotas (Brazil) Birth Cohort at age 30-year follow-up (N = 3630). We first used logistic regression analysis to test whether body mass index (BMI), fat mass (FM), and fat-free mass (FFM) were associated with ADHD. We further tested the association between BMI polygenic risk score (BMI-PRS) and ADHD and the role of the genes upregulated in the reward system using a gene-set association approach. BMI (odds ratio [OR] = 1.05; 95% confidence interval [CI], 1.00-1.09; p = 0.038) and FM (OR = 1.04; 95% CI, 1.00-1.07; p = 0.043) were associated with ADHD. The BMI-PRS was associated with ADHD (using p-value threshold (PT) = 0.4; OR = 1.65; 95% CI, 1.02-2.65) at a nominal level. In gene-set analysis, the reward system genes were associated with BMI in subjects with a high BMI-PRS score, considering PT = 0.4 (p = 0.014). The results suggest that BMI genetic components, especially those genes related to the reward system, may be involved in this association.

Mental disorders, comorbidities, and suicidality at 30 years of age in a Brazilian birth cohort.

BACKGROUND: Studies on mental disorders prevalence and comorbidity, including suicidality, are scarce in low and middle-income settings. We aimed to describe the pattern of comorbidity between mental disorders and their association with suicidality. METHODS: In 1982, all hospital deliveries in Pelotas (Southern Brazil) were identified (n = 5914) and have been prospectively followed. Participants were evaluated for the presence of common mental disorders (CMD) at the ages of 18-19, 23 and 30 years. In 2012-13 (30 years of age), trained psychologists evaluated 3657 individuals for disorders using the Mini International Neuropsychiatric Interview. RESULTS: Prevalence of suicidal wishing, suicidal planning and lifetime suicidal attempt was 4.9%, 3.8% and 6.6%, respectively. Suicidal wishing was most strongly associated with having joint major depressive episode (MD) and lifetime suicidal attempt (OR = 26.4, 95%CI:13.9-50.4) with comorbid MD with mania/hypomania (OR = 21.2, 95%CI:6.93-65.1). Suicidal planning was most strongly associated with having joint MD and lifetime suicidal attempt (OR = 44.7, 95%CI:22.6-88.4), with comorbid MD and social anxiety disorder (OR = 30.6, 95%CI:13.0-72.0), and joint social anxiety disorder with lifetime suicidal attempt (OR = 26.3, 95%CI:8.33-82.7). Independently of other disorders, prospective and cross-sectional measures of CMD were associated with higher rates of suicidality. LIMITATIONS: We do not have data on suicide deaths in follow-up and the diagnostic instrument used at 30 years of age was not used in all previous follow-up. CONCLUSION: MD and social anxiety have independent and combined associations with suicidality, and also with they occur with lifetime suicidal attempt and other mental disorders.

How sex differences in schooling and income contribute to sex differences in depression, anxiety and common mental disorders: The mental health sex-gap in a birth cohort from Brazil.

BACKGROUND: Reasons for the higher rates of depression, anxiety and common mental disorders among women are unclear. We investigated the mediating effect of schooling and personal income and the effect modification of maternal schooling and family income at baseline. METHODS: In 1982, the maternity hospitals of Pelotas (Southern Brazil) were daily visits and those livebirths whose family lived in the urban area of the city were examined and their mothers interviewed. At 30 years, the presence of major depression (MD) and generalized anxiety disorder (GAD) was assessed using the Mini-International Psychiatric Interview, and common mental disorders (CMD) with the self-rated questionnaire. We used Mantel-Haenszel test to assess effect modification and a counterfactual framework using inverse probability weights (IPW) and G-computation to analyze mediation. RESULTS: Income at 30 years captured part of the association of sex with MD (16.5%), GAD (14.2%), and CMD (18.0%). Schooling at 30 years was higher in women (p<0.001), and therefore inversely mediated the association with MD (-5.4%), GAD (-4.8%), and CMD (-6.7%). If we fixed the mediator to earning more than 3 minimum salaries, the effect of sex, was reduced in 64.9%, 56.7% and 31.4%, for MD, GAD and CMD, respectively, and 62.4%, 13.6% and 23.8%, if fixed to 12 or more years of schooling. LIMITATIONS: We were not able to evaluate mental health and socioeconomic changes, or assess a bidirectional effect CONCLUSION: Personal income and schooling at 30 years, are important mediators and effect modifiers of the association between sex and MD, GAD, and CMD.

Why Brazilian women suffer more from depression and suicidal ideation: a mediation analysis of the role of violence.

OBJECTIVE: We aimed to investigate the mediating effect of violence by a family member or acquaintance on biological sex, depression and suicidal ideation. METHODS: We used data from the 2013 Brazilian National Health Survey, a cross-sectional nationwide survey. Major depressive episode and suicidal ideation were evaluated with the Patient Health Questionnaire. Violence victimization and other sociodemographic variables were self-reported. We used logistic regression to estimate the OR, 95%CI and G-computation to calculate the natural direct and indirect effects. RESULTS: A total of 60,202 individuals were evaluated. Women had higher prevalences of major depressive episode (OR = 2.36; 95%CI 2.03-2.74), suicidal ideation (OR = 2.02; 95%CI 1.73-2.36) and violence victimization (OR = 1.73; 95%CI 1.45-2.06). The mediation analysis showed that 10.6% of the association between sex and major depressive episode and 8.0% of the association between sex and suicidal ideation is explained by violence. CONCLUSIONS: Women in Brazil have an increased risk of major depressive episode and suicidal ideation, and this association is mediated, in part, by the fact that they suffer more violence from family members or acquaintances.