Table 2.
Questionnaires to assess the primary outcome, secondary outcomes, moderators, mediators, and explanatory factors (including background attitudes, experiences of app use, and cost-effectiveness).
| Variables | Measurement (number of items) | Measurement in weeks | ||||||||
|
|
|
0 (baseline) | 4 | 8 | 12 | 24 | ||||
| Primary outcome measure | ||||||||||
|
|
Fatigue symptoms | FSIa (15): Severity Scale (4) and Interference Scale (7) | IbCc | IC | IC | IC | IC | |||
| Secondary outcome measures | ||||||||||
|
|
QoLd | EORTC-QLQ-30e—Past week (1) and QoL—On Average (1) | IC | IC | IC | IC | IC | |||
| Moderators | ||||||||||
|
|
Demographic and health characteristics | —f | IC | — | — | — | — | |||
| Mediators | ||||||||||
|
|
Mindfulness | MAAS-5g (5) | IC | IC | IC | IC | IC | |||
|
|
Physical activity | (3) | IC | IC | IC | IC | IC | |||
|
|
Depression | PROMIS-29h (4) | IC | IC | IC | IC | IC | |||
|
|
Sleep | |||||||||
|
|
|
Quality | PROMIS-29 (1) | IC | IC | IC | IC | IC | ||
|
|
|
Disturbance | SLC-90-Ri (3) | IC | IC | IC | IC | IC | ||
|
|
Fatigue catastrophizing | FCSj (13): Rumination (4), Magnification (3), and Helplessness (6) | IC | IC | IC | IC | IC | |||
| Explanatory factors | ||||||||||
|
|
Patients expectancy | (3) | I | — | — | C | — | |||
|
|
Patients motivation | (2) | I | — | — | C | — | |||
|
|
Patients support in environment | WHYMPI/MPIk (5) | IC | IC | IC | IC | IC | |||
|
|
Pain interference | RAND-36l (2) | IC | IC | IC | IC | IC | |||
|
|
Experienced changes | (5) | — | — |
|
IC | IC | |||
|
|
User experience of the app | (19) | — | — | — | I | C | |||
|
|
Cost-effectiveness | (6) | — | — | — | IC | — | |||
aFSI: Fatigue Symptom Inventory (fatigue severity scale, fatigue interference scale).
bI: intervention measurement.
cC: control measurement.
dQoL: quality of Life.
eEORTC-QLQ-30: European Organization for Research and Treatment for Cancer Quality of Life Questionnaire.
fNot applicable.
gMAAS-5: The Mindful Attention Awareness Scale.
hPROMIS-29: Patient-Reported Outcomes Measurement Information System (depression scale, sleep scale).
iSLC-90-R: Symptom Checklist-90-Revised (sleep disturbance scale).
jFCS: Fatigue Catastrophizing Scale (fatigue catastrophizing—adapted from PCS: Pain Catastrophizing Scale; rumination, magnification, and helplessness scales).
kWHYMPI/MPI: The West Haven-Yale Multidimensional Pain Inventory.
lRAND-36: Research and Development (pain interference scale).