Table 4. Percentage of Participants Achieving Minimal Clinically Important Improvements and Reporting Global Improvement, Using Multiply Imputed Data.
| Measurement | Intervention | Control | Relative risk | Risk difference | ||
|---|---|---|---|---|---|---|
| (95% CI)a | P value | (95% CI)b | P value | |||
| Improvement, units | ||||||
| NRS, ≥1.8c | 72.1 | 42.0 | 1.72 (1.25-2.18) | <.001 | 0.30 (0.16-0.44) | <.001 |
| WOMAC, ≥6c | 68.0 | 40.8 | 1.66 (1.19-2.13) | <.001 | 0.27 (0.13-0.41) | <.001 |
| Improved overalld | 57.3 | 27.4 | 2.09 (1.26-2.92) | <.001 | 0.30 (0.16-0.44) | <.001 |
Abbreviations: NRS, numeric rating scale; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index.
a
Relative risk of >1 favors the intervention.
b
Risk difference of >0 favors the intervention.
c
Minimal clinically important improvements.
d
Rated using 7-point scales with terminal descriptors of much worse to much better, with those indicating moderately better or much better classified as improved.