Table A.3.
Regression coefficients and subdistribution hazard ratios for model based on patients with a recorded diagnosis of knee osteoarthritis in their electronic health record (N = 6043)
| Predictors | Regression coefficient from Fine &">& Gray competing risk model (95% CI) | Subdistribution hazard ratio (SHR) (95% CI) |
|---|---|---|
| Age (per unit increase), years | 0.42 (0.34–0.50) | 1.52 (1.40–1.65) |
| Age2 | −0.0032 (−0.0038 to −0.0026) | 0.9968 (0.9962–0.9974) |
| Prescribing of OA medications (yes) | 0.32 (0.20–0.45) | 1.38 (1.22–1.56) |
| Count of chronic conditions from CCI (per unit increase) | −0.19 (−0.27 to −0.11) | 0.82 (0.76–0.89) |
| Mental health condition (yes) | −0.13 (−0.27 to 0.008) | 0.88 (0.76–1.01) |
| Previous TKR (yes) | 0.24 (0.07–0.42) | 1.27 (1.07–1.52) |
| Past knee surgery (excluding TKR) (yes) | 0.55 (0.37–0.74) | 1.74 (1.45–2.09) |
AbbreviationsCI = confidence interval; SHR = subdistribution hazards ratio from competing risk model; OA = osteoarthritis; CCI=Charlson Comorbidity Index; TKR = total knee replacement.
Note: Subdistribution hazard ratio obtained by exponentiating the regression coefficient from the Fine & Gray competing risk model.