Patients will be recruited by consecutive non-probabilistic sampling at the Outpatient Mental Health Centre of Nou Barris in Barcelona and subsequently randomised into 2 groups, control and intervention. Presence and severity of insomnia will be assessed through the following measurement instruments: ISI for presence and severity, PSQI for sleep quality and EQ-5D for health-related quality of life. Patients in intervention will attend 6 group sessions with cognitive behavioural and psychoeducational intervention and the control group will carry out the usual follow-up. Pre-post, 6-month and 9-month assessments will be analysed.
