Table 2.
Main group, time, and interaction effect for the primary and secondary outcomes.
| Model | Group | Time | Group × Time | ||||
|---|---|---|---|---|---|---|---|
| AIC | F (df) | P-Value | F (df) | P-Value | F (df) | P-Value | |
| Primary outcomes | |||||||
| PCS-P | 825.5 | 0.292 (1) | 0.593 | 9.831 (4) | <0.001 | NA | |
| FDI-P | 882.1 | 0.959 (1) | 0.337 | 3.272 (4) | 0.014 | NA | |
| Secondary outcomes | |||||||
| POFQ-P | 928.0 | 1.620 (1) | 0.214 | 4.527 (4) | 0.002 | NA | |
| FPS-R | 628.2 | 2.622 (1) | 0.117 | 2.536 (4) | 0.045 | NA | |
| PCS-P (Rum.) | 626.0 | 0.069 (1) | 0.791 | 6.800 (4) | <0.001 | NA | |
| PCS-P (Magn.) | 463.8 | 0.445 (1) | 0.511 | 2.440 (4) | 0.052 | NA | |
| PCS-P (Help.) | 650.3 | 0.439 (1) | 0.514 | 8.947 (4) | <0.001 | NA | |
| PPT Trapezius | 92.8 | 1.356 (1) | 0.255 | 0.074 (1) | 0.788 | NA | |
| PPT Umbilicus | 54.7 | 0.207 (1) | 0.653 | 5.745 (1) | 0.024 | NA | |
| PPT Tibia | 146.0 | 0.524 (1) | 0.476 | 4.226 (1) | 0.050 | NA | |
| CPM, Abs Diff. | 72.788 | 1.928 (1) | 0.177 | 3.176 (1) | 0.087 | NA | |
| CPM, % change | 492.291 | 3.343 (1) | 0.080 | 1.063 (1) | 0.314 | NA | |
Abbreviations: PCS-P: Pain Catastrophizing Scale for Parents (score: 0–52); FDI-P: Functional Disability Inventory-Parent proxy (score: 0–60); FOPQ-P: Fear of Pain Questionnaire-Parent version (score: 0–92); FPS-R: Faces Pain Scale-Revised (range 0–10); PPT: Pain Pressure Threshold; CPM: Conditioned Pain Modulation; CPT: Cold Pressor Task; AIC: Akaike information criterion; (df): Degrees of freedom; NA: Not applicable; Calculations: CPM absolute difference = (PPT Trapezius–PPT Trapezius during CPM); CPM Percentage change = (((PPT Trapezius-PPT Trapezius during CPM)/PPT Trapezius during CPM)*100).