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Cox analysis of hazard ratios for 1 year mortality risk by intervention period
| Variable | HR (95% CI) | |
|---|---|---|
| Unadjusted | Adjusted | |
| Period (post v. pre) | 0.935 (0.85–1.03) | 0.87 (0.79–0.96) |
| Age | — | 1.05 (1.04–1.05) |
| Sex (male v. female) | — | 1.87 (1.69–2.07) |
| Presence of comorbidities (≥ 1 v. 0) | — | 2.57 (2.33–2.84) |
| Procedure type (internal fixation v. arthroplasty) | — | 1.20 (1.08–1.33) |
| Centred yr of surgery (last v. first) | — | 0.98 (0.94–1.03) |
CI = confidence interval; HR = hazard ratio.
