The Efficacy of a Transdiagnostic Sleep and Circadian Intervention for Patients With Mental Disorders and Sleep Problems

Inclusion Criteria: * Age ≥18 years * F31 Bipolar disorder, F32 unipolar depression or F90 attention deficit disorder * Insomnia Severity Index (ISI) ≥ 14 (exceeding the threshold for a sleep problem) * Sleep problems for 3 months: 3 times a week at least one of the following: * Sleep onset latency ≥ 30 minutes * Wake after sleep onset ≥ 30 minutes * Total sleep time ≥ 11 hours per day * Displaced circadian rhythm; sleeps earlier than 8 P.M. or later than 02 A.M. * Irregular circadian rhythm; bedtime varies ≥ 3 hours throughout the week Exclusion Criteria: * Acutely increased suicide risk (Central Regions guideline for assessment of suicide risk) * Active substance abuse (F10-19) * The sleep problem can be significantly explained by insufficient treatment of physical * disease affecting sleep (documented in patients electronic journal) * Unstable social situation (does not have a permanent residence) * Shift work (≥ 2 times a week for the last 2 months) * Pregnancy and breast-feeding