Outcome measures
Anxiety, fatigue, DMFS, depressive, Depression, Fatigue
For evaluation of the effects of the short add-on sleep therapy, validated Dutch versions of four self-reported questionnaires were administered, including the Pittsburg Sleep Quality Index (PSQI), the Dutch Multi-Factor Fatigue Scale (DMFS), the Hospital Anxiety and Depression Scale (HADS) and the Dysfunctional Beliefs and Attitudes about Sleep Scale brief version (DBAS-16). All self-report questionnaires were administered at baseline and post-treatment.The primary outcome measure was the self-report Pittsburg Sleep Quality Index (PSQI) questionnaire (Secondary outcome measures included the DMFS, the HADS and the DBAS-16. The Dutch Multi-Factor Fatigue Scale (DMFS) is a self-report questionnaire and considered to be a subjective measure of fatigue (Anxiety and depressive symptoms were examined using the Hospital Anxiety and Depression Scale (HADS) (The Dysfunctional Beliefs and Attitudes about Sleep Scale brief version (DBAS-16) was administered to assess dysfunctional beliefs and attitudes about sleep (