Table 4.
Pearson correlation coefficient for the relationship between the outcome measures
| Outcomes | r2 | P value |
|---|---|---|
| NPRS vs. | ||
| NDI | 0.82 | < 0.000 |
| CROM—extension | −0.02 | 0.918 |
| CROM—lateral flexion (affected) | −0.05 | 0.817 |
| CROM—rotation (affected) | −0.32 | 0.100 |
| PPT—cervical spine | −0.33 | 0.086 |
| PPT—affected dermatome | −0.03 | 0.906 |
| HPT—cervical spine | 0.04 | 0.833 |
| HPT—affected dermatome | −0.17 | 0.475 |
| CPT—cervical spine | 0.11 | 0.587 |
| CPT—affected dermatome | 0.10 | 0.683 |
| NDI vs. | ||
| CROM—extension | −0.2 | 0.304 |
| CROM—lateral flexion (affected) | −0.19 | 0.339 |
| CROM—rotation (affected) | −0.26 | 0.18 |
| PPT—cervical spine | −0.16 | 0.426 |
| PPT—affected dermatome | 0.16 | 0.538 |
| HPT—cervical spine | 0.07 | 0.727 |
| HPT—affected dermatome | −0.22 | 0.362 |
| CPT—cervical spine | −0.03 | 0.875 |
| CPT—affected dermatome | 0.22 | 0.37 |
Abbreviations: NPRS Numeric pain rating scale, NDI Neck disability index, CROM Cervical range of motion, PPT Pressure pain threshold, HPT Heat pain threshold, CPT Cold pain threshold