Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Change in severity of insomnia |
All patients included in the study will be asked to complete the Insomnia Severity Index (ISI; Minimum value = 0; Maximum value = 4. Higher scores mean worse outcome) to assess for any changes in symptoms of insomnia. |
At baseline (before first session), at session 6 (last ordinary session, 5-7 weeks after baseline), at session 7 (2 months after last ordinary session) and 6 months after completing the course. |
|
Primary |
Change in symptoms of insomnia |
All patients included in the study will be asked to complete the Bergen Insomnia Scale ( Minimum value = 0; Maximum value = 7. Higher scores mean worse outcome) to assess for any changes in symptoms of insomnia. |
At baseline (before first session), at session 6 (last ordinary session, 5-7 weeks after baseline), at session 7 (2 months after last ordinary session) and 6 months after completing the course. |
|
Secondary |
Change in sleep efficiency |
All patients included in the study will be asked to keep a sleep diary for the whole duration of the course. Sleep efficiency will be calculated based on the sleep diary. |
Calculations of sleep efficiency at baseline (before first session), at session 6 (last ordinary session, 5-7 weeks after baseline), at session 7 (2 months after last ordinary session) and 6 months after completing the course, will be compared. |
|
Secondary |
Change in dysfunctional beliefs and attitudes about sleep |
All patients included in the study will be asked to complete the Dysfunctional Beliefs and Attitudes about Sleep scale (DBAS-16; Minimum = 0; Maximum = 10. Higher values mean worse outcome) to assess for any changes in dysfunctional beliefs and attitudes about sleep. |
At baseline (before first session), at session 6 (last ordinary session, 5-7 weeks after baseline), at session 7 (2 months after last ordinary session) and 6 months after completing the course. |
|
Secondary |
Change in daytime rumination about tiredness and negative consequences of lack of sleep |
All patients included in the study will be asked to complete the Daytime Insomnia Symptom Response Scale (DISRS; Minimum = 1; Maximum = 4. Higher values mean worse outcome) to assess for any changes in rumination about insomnia symptoms. |
At baseline (before first session), at session 6 (last ordinary session, 5-7 weeks after baseline), at session 7 (2 months after last ordinary session) and 6 months after completing the course. |
|
Secondary |
Change in compliance with sleep hygiene measures |
All patients included in the study will be asked to complete the Sleep Hygiene Index (SHI-13; Minimum value = 1; Maximum value = 5. Higher values mean worse outcome) to assess for any changes in compliance with sleep hygiene measures. |
At baseline (before first session), at session 6 (last ordinary session, 5-7 weeks after baseline), at session 7 (2 months after last ordinary session) and 6 months after completing the course. |
|
Secondary |
Change in symptoms of depression |
All patients included in the study will be asked to complete the Patient Health Questionnaire-9 (PHQ-9; Minimum value = 0; Maximum value = 3. Higher values mean worse outcome) to assess for any changes in symptoms of depression. |
At baseline (before first session), at session 6 (last ordinary session, 5-7 weeks after baseline), at session 7 (2 months after last ordinary session) and 6 months after completing the course. |
|
Secondary |
Change in symptoms of anxiety |
All patients included in the study will be asked to complete the Generalized Anxiety Disorder Scale-7 (GAD-7; Minimum value = 0; Maximum value = 3. Higher values mean worse outcome) to assess for any changes in symptoms of anxiety. |
At baseline (before first session), at session 6 (last ordinary session, 5-7 weeks after baseline), at session 7 (2 months after last ordinary session) and 6 months after completing the course. |
|
Secondary |
Change in somatic symptoms |
All patients included in the study will be asked to complete the Somatic Symptom Scale-9 (SSS-8; Minimum value = 0; Maximum value = 4. Higher value mean worse outcome) to assess for any changes in somatic symptom burden. |
At baseline (before first session), at session 6 (last ordinary session, 5-7 weeks after baseline), at session 7 (2 months after last ordinary session) and 6 months after completing the course. |
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