Table 3.
Comparison of Quantitative Sensory Tests at Baseline
| Measurement | All Subjects (N=119) |
Treatment | |
|---|---|---|---|
| Sham (n=57) |
Active (n=62) |
||
| Mechanical Pain Thresholds | |||
| PPT Thumb Joint (kPa) | 211 (95) | 205 (88) | 217 (104) |
| PPT Trapezius Muscle (kPa) | 254 (151) | 249 (150) | 259 (152) |
| Cuff Pressure Gastrocnemius (mmHg)* | 131 (66) | 131 (67) | 132 (65) |
| Mechanical Pain Responses | |||
| Punctate Stimulus, 1st of 10† | 12.1 (12.9) | 12.4 (14.6) | 11.8 (11.2) |
| Punctate Stimulus, 5th of 10† | 20.6 (16.1) | 19.9 (16.8) | 21.2 (15.6) |
| Punctate Stimulus, 10th of 10† | 26.1 (19.6) | 25.8 (20.1) | 26.3 (19.2) |
| Cold Pain Responses | |||
| CPT at 15 sec† | 74.5 (21.6) | 73.4 (20.1) | 75.4 (23.0) |
| CPT Aftersensation at 30 sec† | 27.3 (24.0) | 30.2 (23.0) | 24.7 (24.8) |
| Central Pain Processing | |||
| Temporal Summation† | 14.0 (14.8) | 13.4 (13.9) | 14.5 (15.7) |
| Conditioned Pain Modulation (%) | 51.9 (40.0) | 52.5 (41.3) | 51.4 (39.0) |
Notes: Reported as mean (SD); *median imputation for 3 subjects without data; †pain rating scale from 0 to 100.
Abbreviations: PPT, pressure pain threshold; CPT, cold pressure test.