Multivariate Cox proportional hazard model: predictors of time to MCID.
| Predictors | HR | 95% CI | P |
| Demographics | |||
| ASA ≥3 | 0.55 | 0.34–0.91 | 0.018 |
| CCI score | 0.88 | 0.75–1.03 | 0.118 |
| PROMIS-PF baseline disability | |||
| Moderate (30–40) vs mild | 1.90 | 0.86–4.22 | 0.113 |
| Severe (<30) | |||
| vs mild | 3.52 | 1.48–8.42 | 0.005 |
| vs moderate | 1.85 | 1.10–3.12 | 0.020 |
Abbreviations: ASA, American Society of Anesthesiologists Score; CCI, Charlson Comorbidity Index; MCID, minimal clinically important difference.
Note: P values < 0.05 in bold.