Table 1.
Study outcome measures by assessment time point.
| Outcome and variable | Measure | Assessment time point | ||||
|
|
|
Baseline | During training | Posttraining | 1-month follow-up | |
| Baseline data | ||||||
|
|
Eligibility screening | Self-report questions | ✓ |
|
|
|
|
|
Demographic information | Self-report questions | ✓ |
|
|
|
|
|
Pain experience information | |||||
|
|
|
Self-report questions | ✓ |
|
|
|
|
|
|
GCPSa | ✓ |
|
|
|
| Primary outcomes | ||||||
|
|
Pain intensity | PROMISb Pain Intensity 3a | ✓ |
|
✓ | ✓ |
|
|
Pain interference | PROMIS Pain Interference 8a | ✓ |
|
✓ | ✓ |
|
|
Self-report engagement | |||||
|
|
|
1 self-report question |
|
✓ | ✓ |
|
|
|
|
IMIc (interest and enjoyment) |
|
|
✓ |
|
|
|
Behavioral engagement | |||||
|
|
|
Intervention attrition rates |
|
✓ | ✓ |
|
|
|
|
Completion rates |
|
✓ | ✓ |
|
| Secondary outcomes | ||||||
|
|
Attentional bias | Dot-probe task | ✓ |
|
✓ |
|
|
|
Anxiety | PROMIS Anxiety 8a | ✓ |
|
✓ | ✓ |
|
|
Depression | PROMIS Depression 8b | ✓ |
|
✓ | ✓ |
|
|
Perceived improvement | PGICd |
|
|
✓ | ✓ |
|
|
Interpretation bias | Interpretation bias task | ✓ |
|
✓ |
|
| Additional measures | ||||||
|
|
Attentional control | ACSe | ✓ |
|
✓ |
|
|
|
Personality characteristics | BIS and BASf scales | ✓ |
|
|
|
|
|
Pain-related worrying | PCSg | ✓ |
|
|
|
|
|
Pain-treatment information | Self-report questions |
|
|
✓ | ✓ |
|
|
Validity check | Instructional question | ✓ |
|
✓ | ✓ |
|
|
Manipulation check | 1 self-report question |
|
|
✓ |
|
aGCPS: Graded Chronic Pain Scale.
bPROMIS: Patient-Reported Outcomes Measurement Information System.
cIMI: Intrinsic Motivation Inventory.
dPGIC: Patient Global Impression of Change.
eACS: Attentional Control Scale.
fBIS and BAS: Behavioral Inhibition System and Behavioral Activation System Scales.
gPCS: Pain Catastrophizing Scale.