Table 5. Quantitative sensory testing outcome in participants with high impact chronic pain and pain-free volunteers.
| Variables | Pain-free (n=70), mean (SD) | High impact chronic pain (n=201), mean (SD) |
|---|---|---|
| Experimental pain, ℃ | ||
| HDT hand | 34.6 (1.3) | 34.3 (1.0) |
| HDT pain area | 35.6 (1.3) | 35.8 (2.1) |
| HPT hand | 44.1 (3.5) | 41.7 (4.3) |
| HPT pain area | 42.7 (3.3) | 40.9 (4.0) |
| Pinprick, NRS | ||
| Pinprick hand | 1.8 (1.6) | 2.7 (2.5) |
| Pinprick pain area | 1.5 (1.4) | 2.5 (2.3) |
| cPPT, kPa | ||
| cPPT right | 27.0 (11.6) | 19.1 (11.9) |
| cPPT left | 25.8 (12.8) | 18.8 (11.0) |
| cPTT right | 59.0 (22.4) | 39.7 (21.5) |
| cPTT left | 59.6 (22.3) | 43.2 (23.5) |
| Pain modulation | ||
| TSP pinprick hand, NRS | 2.4 (1.7) | 3.4 (2.1) |
| TSP pinprick back, NRS | 2.2 (1.7) | 3.9 (2.3) |
| TSP ratio, cuff | 2.6 (4.6) | 5.6 (11.2) |
| CPM-response, kPa | 8.2 (11.6) | 2.4 (8.1) |
SD, standard deviation; HDT, heat detection threshold; HPT, heat pain threshold; NRS, numerical rating scale; cPPT, cuff pressure pain threshold; cPTT, cuff pressure pain tolerance; TSP, temporal summation of pain; CPM, conditioned pain modulation.