Table 2.
Multiple imputed clinical outcomes at follow-up
| Outcome | Chiropractic care (n=59) |
Self-management (n=56) |
Difference* |
|---|---|---|---|
| Mean (SD) | Mean (SD) | Δ (95% CI) | |
| EQ-5D | |||
| Baseline | 0.738±0.021 | 0.718±0.022 | |
| 4 weeks | 0.786 (0.021) | 0.796 (0.018) | −0.021 (−0.065 to 0.023) |
| 12 weeks | 0.811 (0.023) | 0.792 (0.020) | 0.009 (−0.044 to 0.062) |
| 52 weeks | 0.826 (0.023) | 0.823 (0.024) | −0.033 (−0.069 to 0.062) |
| 1-year QALY (EQ-5D) | 0.811 (0.019) | 0.802 (0.017) | 0.0094 (−0.041 to 0.060) |
| SF-36 | |||
| Baseline | 0.695±0.015 | 0.676±0.016 | |
| 4 weeks | 0.742 (0.018) | 0.727 (0.020) | 0.004 (−0.039 to 0.047) |
| 12 weeks | 0.757 (0.018) | 0.754 (0.021) | −0.010 (−0.056 to 0.035) |
| 52 weeks | 0.788 (0.018) | 0.774 (0.021) | 0.003 (−0.045 to 0.051) |
| 1-year QALY (SF-6D) | 0.765 (0.0157) | 0.756 (0.0190) | 0.0092 (−0.039 to 0.058) |
*The mean outcome differences between chiropractic care and self-management were adjusted for the baseline difference.
EQ-5D, EuroQol five-dimension questionnaire; QALY, quality-adjusted life year; SF-6D, six-dimensional health status short form; SF-36, Short Form 36-item Health Survey.