Table 4.
Mean (SD) costs and QALYs by treatment group over 24 months.
| Early MRI | Orthopaedic referral | Difference | Non-parametric 95% CIa | |
|---|---|---|---|---|
| Mean cost over 24 months, £ | 1315 (1370) | 1021(1178) | 294 | 31 to 573 |
| Mean QALYs over 24 months | 1.444 (0.347) | 1.393 (0.377) | 0.050 | −0.025 to 0.118 |
| Sensitivity analyses | ||||
| Mean QALYs (adjusted for differences in baseline utility)b | 1.449 | 1.387 | 0.061 | 0.005 to 0.117 |
| Mean cost, £ (assuming 50% fewer outpatient visits in MRI group) | 1289 | 1021 | 268 | 13 to 523 |
| Mean cost, £ (assuming 30% lower MRI cost) | 1218 | 983 | 234 | −£16 to 485 |
a
Non-parametric CI based on bias corrected and accelerated bootstrapping (1000 replications).
b
Predicted scores after controlling for baseline imbalances. MRI = magnetic resonance imaging. QALY = quality-adjusted life year.