Participants
drug abuse or dependence, sleep disorder, fatigue, brain injury, psychosis, brain damage, Parkinson, Multiple Sclerosis), ideations, disability
NEURODEGENERATIVE DISORDERS, RESTLESS LEGS SYNDROME, OBSTRUCTIVE SLEEP APNOEA
Participants were recruited from the outpatient department of the Rehabilitation Medical Centre Klimmendaal in Arnhem, The Netherlands. To be eligible for inclusion, participants (1) had to have an acquired brain injury (≥3 months post-injury), (2) had self-reported sleep problems which are associated with disability in daily life (not confirmed by a self-reported questionnaire measuring sleep disturbances) (3) were aged between 18 and 75 and (4) received outpatient rehabilitation services. Exclusion criteria were (1) severe brain damage, (2) neurodegenerative disorders (e.g., Parkinson, Multiple Sclerosis), (3) were diagnosed with a sleep disorder prior to injury (e.g., obstructive sleep apnoea, restless legs syndrome), (4) alcohol or drug abuse or dependence, (5) had serious psychopathology (e.g., risk for psychosis) or expressed suicidal ideations and (6) recently started taking sleep medication (less than a month ago). All participants voluntarily participated in this study. Sleep disturbances refer to sleep problems that occur at night and are characterized by the inability to initiate and maintain sleep and are associated with fatigue during daytime.For the calculation of the required sample size, G*Power for ANOVA was used (The present study was registered at The Dutch Trial Register; registration number NL9368; 