Subgroup | Unmatched cohort | Propensity score matched cohort | ||||||
In-hospital mortality | OR (95% CI) | P value | In-hospital mortality | OR (95% CI) | P value | |||
Surgical treatment (−) | Surgical treatment (+) | Surgical treatment (−) | Surgical treatment (+) | |||||
Non-elderly | 377/4909 (7.7%) | 137/2894 (4.7%) | 0.60 (0.49 to 0.73) | <0.001* | 151/1785 (8.5%) | 82/1785 (4.6%) | 0.52 (0.39 to 0.69) | <0.001* |
Elderly | 873/5628 (15.5%) | 245/2246 (10.9%) | 0.67 (0.57 to 0.78) | <0.001* | 242/1625 (14.9%) | 173/1625 (10.6%) | 0.68 (0.55 to 0.84) | <0.001* |
Very elderly | 1065/4525 (23.5%) | 73/465 (15.7%) | 0.61 (0.47 to 0.78) | <0.001* | 104/414 (25.1%) | 70/414 (16.9%) | 0.61 (0.43 to 0.85) | 0.004* |
*P values are significant.