In this nationwide prospective cohort study, the risk of premature death among persons with OCD was doubled compared with the general population. Around 40% of all deaths among persons with OCD were attributed to unnatural causes, with increased mortality rates observed for both suicides and accidents among persons with OCD. The estimates seemed not to be confounded by factors shared by the siblings because the risk estimates remained significantly elevated in between-siblings analyses. These findings present new information on long-term outcomes of OCD, which should be taken into account in the clinical management of OCD in psychiatry and primary care services.
