Treatment module | Instrument [REF] | Outcome | Response format | Psychometric properties | Cut-off value |
---|---|---|---|---|---|
1. Coping with cancer and cancer treatment | Impact of Event Scale [62] | Intrusion and avoidance | 4-point Likert scale, range 0–60 | Cronbach’s α ranges between 0.87 and 0.96; adequate convergent validity [63] | Score ≥10 for each separate scale |
2. Fear of cancer recurrence | Modified cancer acceptance scale [53] | Fear of disease recurrence | 4-point Likert scale, range 3–12 | N/A | Score ≥7 |
Cancer worry scale [64] | Worries about the risk of developing cancer (again) | 4-point Likert scale, range 8–32 | Cronbach’s α = 0.87; good convergent and divergent validity [64] | Score ≥14 [64] | |
3. Helpful thinking | Somatic and non-somatic attributions | 4-point Likert scale | Cronbach’s α ranges between 0.71 and 0.77 [65] | N/A | |
Focusing on symptoms | 6-point Likert-scale, range 9–54 | Cronbach’s α ranges between 0.85 and 0.93 [66] | Score ≥30 | ||
Fatigue catastrophizing scale [68] | Catastrophizing in response to fatigue | 5-point Likert scale, range 1–5 | Cronbach’s α = 0.85 [68] | Score ≥2 (magnifying); score ≥7 (ruminating). | |
Self-efficacy with respect to fatigue | 4 point Likert scale, range 7–28 | N/A | Score ≤19 | ||
4. Sleep-wake rhythm | Sleep-wake diary | Sleep-wake rhythm | Bedtimes and wake-up times of 12 consecutive days and nights | N/A | N/A |
5. Activity regulation | An actometer, a motion-sensing device, worn to the ankle for 12 consecutive days and nights | Activity pattern (relatively active versus low active) | Average physical activity level (number of accelerations per 5 min period) [69] | Adequate reliability and validity [73] | N/A |
6. Social support | Van Sonderen Social Support Inventory, subscales Interactions (SSLI) and Discrepancies (SSLD) [70] | Discrepancy between actual and desired social support | 4-point Likert Scale, range 34–136 | Cronbach’s α = 0.93 (SSLI); α = 0.95 (SSLD); good content validity [71] | Score ≥14 (SSLI); score ≥50 (SSLD) |