Deficits in sustained attention in patients with schizophrenia but not with bipolar disorder

Materials and methods Participants were 29 (18 men) outpatients with schizophrenia (SZ), 19 (8 men) remitted patients with bipolar disorder I (BP), and 30 (15 men) healthy controls (HC); all groups were matched to each other for age, sex, and level of education. Symptom severity (positive symptoms, negative symptoms, and general psychopathology) of patients with SZ were assessed with the Greek version of the Positive and Negative Syndrome Scale (PANSS); residual affective symptoms of patients with BP were assessed with the Young Mania Rating Scale (YMRS) and the Montgomery-Asberg Depression Rating Scale (MADRS). Sustained attention was measured by means of the Penn Continuous Performance Test (PCPT).