Table 2.
Descriptive data [mean (SD)] for the CPM ratings, psychosocial and HRV measures.
| Boys (n = 60) | Girls (n = 64) | Younger (n = 44) | Older (n = 80) | Total Sample (N = 124) | |
|---|---|---|---|---|---|
| TS1 | 5.32 (2.2) | 5.38 (1.9) | 5.66 (2.1) | 5.18 (2.0) | 5.35 (2.1) |
| TS2 | 3.83 (2.1) | 3.80 (2.0) | 4.68 (2.2) | 3.34 (1.8) | 3.81 (2.0) |
| TS3 | 4.50 (2.4) | 3.98 (1.9) | 4.93 (2.3) | 3.85 (2.0) | 4.23 (2.1) |
| TS4 | 4.97 (2.0) | 5.05 (1.8) | 5.72 (2.0) | 4.62 (1.7) | 5.01 (1.9) |
| Absolute CPM | −1.48 (2.0) | −1.58 (2.2) | −0.98 (2.4) | −1.84 (1.9) | −1.53 (2.1) |
| CPM Percent Change | −21.8% (45.5) | −24.2 (38.3) | −9.2% (44.5) | −30.6% (38.4) | −23.0% (41.8) |
| Anticipatory Anxiety | 4.12 (3.0) | 4.17 (2.8) | 4.70 (3.0) | 3.84 (2.8) | 4.15 (2.9) |
| PCS-C | 15.0 (8.2) | 15.7 (7.9) | 15.2 (7.0) | 15.4 (8.6) | 15.3 (8.0) |
| CPASS | 25.7 (16.8) | 26.4 (15.5) | 28.5 (17.1) | 24.7 (15.5) | 26.1 (16.1) |
| CHQ Bodily Pain Subscale (Transformed Score) | 75.6 (17.7) | 76.8 (20.5) | 81.1 (18.6) | 73.5 (19.1) | 76.2 (19.2) |
| rMSSD | |||||
| Pre-task Baseline | 65.9 (39.1) | 61.2 (39.0) | 65.4 (40.7) | 62.3 (38.2) | 63.4 (38.9) |
| Post-task Period | 61.4 (35.2) | 61.3 (46.7) | 64.5 (42.5) | 59.7 (40.9) | 61.4 (41.4) |
Note: CPM = Conditioned Pain Modulation; TS = Test stimulus; Absolute CPM = TS2 minus TS1; CPM percent change = percent change from TS1 to TS2; PCS-C = Pain Catastrophizing Scale for Children; CPASS = Child Pain Anxiety Symptoms Scale – 20 item version; CHQ = Child Health Questionnaire; rMSSD = Root mean square of successive differences; Psychosocial measures data were unavailable for two participants; TS4 was missing for one participant; Pre-task baseline was missing for five participants; Post-task period data was missing for six participants.