Abstract Background Interpersonal violence is a known risk factor for suicide, but its impact across racial and ethnic groups, particularly among Black and Indigenous youth, remains underexplored. Methods We conducted a nationwide longitudinal study involving 9,788,264 individuals aged 10–29 years who were enrolled in the 100 Million Brazilian Cohort and linked to Notifiable Diseases Information System (SINAN), National Hospital Information System (SIH) and Mortality Information System (SIM) (2011–2018). Exposure was any recorded interpersonal violence; the outcome was suicide (ICD-10 X60–X84). Cox models adjusted for demographic, socioeconomic, household factors, prior psychiatric hospitalization, and self-harm. Analyses were stratified by race. Findings During follow-up, 92,287 (0·94%) individuals had a record of interpersonal violence, and 1,657 suicides were identified. Exposure to violence was associated with a higher risk of suicide (HR 2·92; 95% CI 2·06–4·15). Associations were strongest among Indigenous youth (HR 10.61; 95% CI 4.34–25.94), followed by Black youth (HR 3.14; 95% CI 1.92–5.14). No significant association was observed among White youth. Interpretation Interpersonal violence is a major risk factor for youth suicide in Brazil, disproportionately affecting Indigenous and Black populations. Addressing systemic racism and structural inequalities is essential for equitable suicide prevention.
Alves et al. (Thu,) studied this question.