Background Approximately 30% of women experience intimate partner violence (IPV) in their lifetime, often with traumatic brain injury (TBI) exposure. Nevertheless, there has been limited research exploring lifelong brain health outcomes following IPV with TBI. To address this, we investigated the relationship between IPV, TBI and midlife mental health outcomes within an observational cohort study.Methods PREVENT Dementia is a cohort study with participants recruited aged 40–59 years for lon...