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Table 2 Tools to assess which treatment modules are indicated

From: A randomized controlled trial of web-based cognitive behavioral therapy for severely fatigued breast cancer survivors (CHANGE-study): study protocol

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 Modified causal attribution list [52, 65] Somatic and non-somatic attributions 4-point Likert scale Cronbach’s α ranges between 0.71 and 0.77 [65] N/A
  Illness management questionnaire [6567] 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 scale [33, 65] 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)