Psychological Trauma Predicts Obesity in Welsh Secure Mental Health Inpatients

People in secure psychiatric services experience high levels of exposure to early psychological trauma, are often diagnosed with severe mental illness (SMI) and have increased risk for obesity. Developmental trauma, SMI and obesity are associated with poor physical health outcomes and early death. This study aimed to assess the predictive power of Adverse Childhood Experiences (ACEs), self-harm and psychiatric diagnosis for secure inpatient weight gain and obesity. Data for 248 Welsh patients accommodated in low, medium, and high secure hospitals throughout England and Wales was analyzed. Patient admission bodyweight (in kilograms), bodyweight at the time of audit, and patient BMI at the time of audit was collected. Sex, psychiatric diagnosis, length of current admission, number of ACEs, and frequency of self-harm were also examined. Patients gained significant amounts of weight between admission until the time of the audit (median period = 1–2 years) and showed high levels of obesity. Self-harm frequency significantly predicted weight difference. Number of ACEs and diagnosis of schizophrenia significantly predicted patient BMI at the time of audit. The study findings indicate that psychological trauma and the nature of mental illness are important factors driving weight gain and excess morbidity in this vulnerable group.