Odds ratios for selected characteristics and 30-day postoperative mortality following total hip arthroplasty (n = 7095)
| Characteristic | Model, OR (95% CI) | ||
|---|---|---|---|
| Model 1, R2 = 0.21 | Model 2, R2 = 0.22 | Model 3, R2 = 0.22 | |
| Provider volume | 1.00 (0.99–1.01) | 1.00 (0.99–1.01) | 1.00 (0.99–1.01) |
| Patient age, yr | 1.05 (1.03–1.06) | 1.04 (1.03–1.06) | 1.04 (1.03–1.06) |
| Patient sex (female v. male) | 0.60 (0.43–0.85) | 0.61 (0.43–0.86) | 0.61 (0.43–0.86) |
| Admission category (urgent v. elective) | 5.73 (3.45–9.51) | 5.75 (3.46–9.55) | 5.82 (3.50–9.67) |
| Patient comorbidity (level v. none) | |||
| 1 | 3.58 (2.21–5.80) | 3.58 (2.21–5.81) | 3.59 (2.21–5.83) |
| 2 | 3.48 (2.11–5.73) | 3.43 (2.08–5.67) | 3.49 (2.11–5.77) |
| 3 | 4.71 (2.69–8.26) | 5.03 (2.86–8.87) | 5.10 (2.89–8.98) |
| 4 | 13.67 (7.77–24.05) | 15.25 (8.56–27.16) | 15.65 (8.75–28.01) |
| Missing/not applicable | 2.04 (0.92–4.56) | 2.07 (0.93–4.63) | 2.05 (0.92–4.59) |
| Neighbourhood income quintile (v. lowest) | |||
| Medium-low | — | 1.12 (0.69–1.82) | 1.12 (0.68–1.82) |
| Middle | — | 0.89 (0.52–1.51) | 0.89 (0.52–1.51) |
| Medium-high | — | 1.12 (0.70–1.78) | 1.12 (0.71–1.79) |
| Highest | — | 0.85 (0.49–1.46) | 0.85 (0.50–1.47) |
| Community size (v. city [population 100 000 to 499 000]) | |||
| Small town (population 10 000 to 99 999) | — | 1.11 (0.71–1.75) | 1.05 (0.66–1.69) |
| Rural area (population < 10 000) | — | 1.56 (1.07–2.27) | 1.51 (1.02–2.22) |
| Hospital mean annual THA volume | — | — | 1.00 (1.00–1.00) |
CI = confidence interval; OR = odds ratio; THA = total hip arthroplasty.