First World War and Mental Health: a retrospective comparative study of veterans admitted to a psychiatric hospital between 1915 and 1918

Aim. The association between mental illness and war has been repeatedly investigated. Higher levels of depressive symptomsand an increased suicidal risk have been found in veterans. In this study we investigated the mental health conditions among Italian soldiers during the "Great War", who were hospitalized in a mental health hospital in Italy. Methods. The study sample consists of 498 soldiers who were admitted during the World War I between 1915 and 1918, and 498 civilian patients admitted in two different periods (1898-1914, 1919- 1932). Psychiatric diagnoses have been recorded retrospectively by a detailed examination of clinical records. Socio-demographic informations, diagnosis at first admission, number of admissions, and deployment in war zones were collected. A logistic regression analysis was performed, the diagnosis of depression was considered as dependent variable while clinical and demographic variables as independent predictors. Results. Soldiers deployed in war zones were more likely to have a diagnosis of depression compared to those not serving on the frontline. The logistic regression analysis showed that the diagnosis of depression is predicted by being a soldier and being deployed in a war area. Discussion and conclusions. Our data confirm that soldiers engaged in war are at higher risk of developing depression compared to nondeployed soldiers.