Table 2.
Correlations between sensory variables, current pain, psychological variables, and medication use (all participants; n=146). CPM, conditioned pain modulation; DSM-Anxiety, anxiety t-score Achenbach Youth Self-Report scale; HUI-3, Health Utilities Index Mark 3; PCS, pain catastrophising scale total score; PPT, pressure pain threshold; VRS, verbal rating scale. Data = two-tailed Spearman's rho bivariate correlation coefficient *P<0.05 **P<0.01
| Baseline PPT | Immersion time | Immersion pain | CPM % | Pain ranking | Regular analgesia | PCS | Anxiety | Regular psychotropics | |
|---|---|---|---|---|---|---|---|---|---|
| Baseline PPT (ln kPa) | 1.0 | ||||||||
| Immersion time (s) | 0.30∗∗ | 1.0 | |||||||
| Immersion pain (VRS) | –0.27∗∗ | –0.36∗∗ | 1.0 | ||||||
| Conditioned pain modulation % (15 s) | –0.30∗∗ | –0.20∗∗ | –0.06 | 1.0 | |||||
| Pain ranking (HUI-3) [n=139] | –0.12 | –0.08 | 0.05 | –0.01 | 1.0 | ||||
| Regular analgesia | –0.11 | –0.09 | 0.07 | 0.03 | 0.31∗∗ | 1.0 | |||
| Pain catastrophising [n=134] | –0.15 | –0.04 | 0.12 | –0.16 | 0.23∗∗ | 0.26∗∗ | 1.0 | ||
| DSM-Anxiety [n=138] | –0.08 | –0.05 | 0.11 | –0.02 | 0.27∗∗ | 0.20∗ | 0.40∗∗ | 1.0 | |
| Regular psychotropics [n=135] | –0.06 | –0.01 | 0.16 | 0.10 | 0.19∗ | 0.20∗ | 0.14 | 0.33∗∗ | 1.0 |