Table 2.
Spearman's rank correlation coefficients within the chronic whiplash associated disorders patients.
| Years | VAS | WDQ | NDI | HADS | Perception threshold (mA) | Pain threshold (mA) | |
|---|---|---|---|---|---|---|---|
| Years | 1 | − 0.03 | 0.30 | 0.00 | − 0.19 | 0.59* | 0.67* |
| VAS | 1 | 0.47 | 0.74** | 0.45 | 0.16 | 0.24 | |
| WDQ | 1 | 0.62* | 0.63* | 0.03 | − 0.03 | ||
| NDI | 1 | 0.61* | 0.07 | 0.19 | |||
| HADS | 1 | − 0.06 | − 0.09 |
Years: years subsequent to the injury, VAS: last 3 months average pain visual analog scale, WDQ: Whiplash Disability Questionnaire, NDI: Neck Disability Index, HADS: Hospital Anxiety and Depression Scale, mA: milliamperes, Significance levels by * p < 0.05 and ** p < 0.01.