TABLE 3.
Subgroup analysis on the association between frailty score and postdischarge mortality.
| Studies (n) | Risk ratio (95% CI) | P-value | Q-test | I2 (%) | P between | |
| Length of follow-up | ||||||
| ≤30 days | 6 | 3.189 (1.661, 6.126) | <0.001 | 19.713 | 74.637** | 0.227 |
| >30 days | 6 | 1.737 (0.828, 3.641) | 0.144 | 13.149 | 61.974* | |
| Mean age | ||||||
| <70 years old | 6 | 2.219 (0.877, 5.616) | 0.092 | 41.467 | 87.942*** | 0.061 |
| 70 years old and more | 5 | 4.816 (1.857, 12.494) | 0.001 | 7.614 | 47.465 | |
| Surgery type | ||||||
| Vascular surgeries | 9 | 2.150 (1.378, 4.571) | 0.003 | 16.857 | 52.542* | 0.673 |
| Amputation only | 3 | 3.585 (0.768, 16.721) | 0.104 | 31.123 | 93.574*** | |
| Severity | ||||||
| Mild | 8 | 3.198 (1.453, 7.037) | 0.004 | 59.432 | 88.222*** | 0.581 |
| Severe | 4 | 2.379 (1.189, 4.762) | 0.014 | 2.307 | <0.001 | |
| Amputation and foot ulcer history | ||||||
| No | 7 | 3.213 (1.582, 6.524) | 0.001 | 13.729 | 56.297* | 0.569 |
| Yes | 5 | 2.170 (0.688, 6.843) | 0.186 | 43.116 | 90.723*** | |
| Poly-medication | ||||||
| No | 11 | 2.993 (1.561, 5.738) | 0.001 | 56.787 | 82.390*** | 0.125 |
| Yes | 1 | 1.284 (0.542, 3.044) | 0.570 | <0.001 | <0.001 | |
| Wound | ||||||
| Open wound | 7 | 2.851 (1.264, 6.428) | 0.012 | 59.543 | 89.923*** | 0.966 |
| Others | 5 | 2.920 (1.427, 5.976) | 0.003 | 4.118 | 2.875 | |
CI, confidence interval. *p < 0.05, **p < 0.01, ***p < 0.001.