Pre‐ to post‐inpatient treatment of subjective sleep quality in 5,481 patients with mental disorders: A longitudinal analysis

There is only limited evidence of the course of sleep quality and sleep disturbances during acute inpatient treatment and the prediction of/association with treatment outcome in mental disorders. Within this naturalistic study, 5,481 consecutively admitted inpatients completed the Pittsburgh Sleep Quality Index (PSQI) and the Beck Depression Inventory (BDI‐II) at admission and at discharge. Treatment included both individual and group psychotherapy (but no specific interventions for sleep disturbances) and pharmacotherapy based on current national treatment guidelines. Correlation analyses, analyses of variance and linear models were calculated to analyse the datasets. The PSQI improved significantly (p 5) at discharge. Patients with post‐traumatic stress disorder showed the largest sleep disturbances at both time‐points; patients with obsessive‐compulsive disorder were the least impaired. An improvement of the PSQI was found to be significantly correlated (p