Association between anti-thyroid antibodies and negative symptoms in early psychosis.

Aim: In the current cross-sectional study, we aimed to explore whether thyroid function or thyroid autoimmunity are associated with psychopathological symptoms and social functioning in patients with early psychosis. We hypothesized that psychopathological severity is greater in those patients with positive thyroid autoimmunity.

Methods: We studied 70 outpatients with early psychosis (<3 years of illness) and 37 healthy subjects.