Results of multivariable weighted logistic regression for the determinants of postarthroplasty mortality. Mortality risk adjusted for the following factors: age, sex, hospital type, surgical indication, length of hospital stay, and modified comorbidity index.
| RA vs Controls OR (95% CI) | p | SLE vs Controls OR (95% CI) | p | |
|---|---|---|---|---|
| Overall | ||||
| All hip | 1.064 (0.754–1.502) | 0.72 | 3.470 (1.762–6.835) | < 0.001 |
| All knee | 0.771 (0.570–1.041) | 0.09 | 2.258 (0.811–6.286) | 0.12 |
| All elective | 0.760 (0.579–0.997) | 0.05 | 2.139 (0.989–4.625) | 0.053 |
| All nonelective | 1.313 (0.868–1.987) | 0.20 | 4.893 (2.190–10.932) | < 0.001 |
| Nonfracture subgroup | ||||
| All hip | 1.097 (0.758–1.586) | 0.62 | 3.113 (1.487–6.515) | 0.003 |
| All knee | 0.903 (0.668–1.221) | 0.51 | 2.544 (0.914–7.075) | 0.074 |
| All elective | 0.861 (0.655–1.131) | 0.28 | 2.338 (1.090–5.016) | 0.03 |
| All nonelective | 1.449 (0.919–2.285) | 0.11 | 4.434 (1.733–11.347) | 0.002 |
| Overall prior to 2002 | ||||
| All hip | 1.131 (0.746–1.714) | 0.56 | 4.098 (1.831–9.172) | < 0.001 |
| All knee | 0.955 (0.682–1.339) | 0.79 | 2.715 (0.682–10.807) | 0.16 |
| All elective | 0.887 (0.643–1.223) | 0.46 | 2.992 (1.078–8.305) | 0.04 |
| All nonelective | 1.399 (0.885–2.211) | 0.15 | 4.276 (1.616–11.311) | 0.003 |
| Overall 2002 or after | ||||
| All hip | 0.895 (0.488–1.641) | 0.72 | 2.387 (0.611–9.321) | 0.21 |
| All knee | 0.416 (0.214–0.808) | 0.01 | 1.924 (0.468–7.918) | 0.36 |
| All elective | 0.566 (0.344–0.931) | 0.03 | 1.255 (0.357–4.411) | 0.72 |
| All nonelective | 0.749 (0.275–2.042) | 0.57 | 6.514 (1.917–22.136) | 0.003 |