Table 2.
Association between patients', THAs', and stays' characteristic and prosthetic revision.
| Covariates | aHR (95% CI),a N = 62,906 | P value |
|---|---|---|
| Gender | .007 | |
| Men | Ref | |
| Women | 0.90 (0.82-0.98) | |
| Age (y) | <.0001 | |
| 40-60 | 1.19 (1.07-1.33) | |
| 60-75 | Ref | |
| ≥75 | 0.86 (0.78-0.96) | |
| Diabetes | 1.11 (0.97-1.26) | .10 |
| Benzodiazepines | 1.21 (1.10-1.32) | <.0001 |
| Antihypertensives | 1.00 (0.92-1.10) | .83 |
| Antidepressants | 1.35 (1.21-1.51) | <.0001 |
| Antiosteoporotics | 1.15 (0.99-1.33) | .06 |
| Oral corticosteroids | 1.34 (1.21-1.49) | <.0001 |
| Lipid-lowering medication | 0.94 (0.85-1.02) | .11 |
| Deprivation index | .07 | |
| 1 (most fortunate) | Ref | |
| 2 | 1.01 (0.88-1.17) | |
| 3 | 1.12 (0.97-1.29) | |
| 4 | 1.19 (1.03-1.37) | |
| 5 (most deprived) | 1.15 (1.00-1.32) | |
| Missing | 1.04 (0.86-1.25) | |
| Bearing surface | .84 | |
| Metal-on-polyethylene | Ref | |
| Ceramic-on-polyethylene | 0.96 (0.85-1.09) | |
| Ceramic-on-ceramic | 1.01 (0.90-1.13) | |
| Metal-on-metal | 0.94 (0.72-1.23) | |
| Fixation type | <.001 | |
| No cement | Ref | |
| Cement without antibiotics | 0.93 (0.74-1.18) | |
| Cement with antibiotics | 0.79 (0.70-0.88) | |
| Length of stay | .05 | |
| <8 d | 1.05 (0.95-1.15) | |
| 8-9 d | Ref | |
| >9 d | 1.13 (1.02-1.26) | |
| Hospital volume (procedures/mo) | .18 | |
| <7 | 1.10 (0.93-1.29) | |
| 7-15 | 1.09 (0.99-1.20) | |
| >15 | Ref | |
| Surgeon volume (procedures/mo) | <.0001 | |
| <1.5 | 1.70 (1.40-2.05) | |
| 1.5-4 | 1.19 (1.07-1.34) | |
| >4 | Ref |
Ref, reference.
a
Adjusted for all factors.