Table 3. Cox-regression analysis for 1-year amputation-free survival (AFS).
| Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|
| Hazard ratio (95%CI) | P value | Hazard ratio (95%CI) | P value | |
| Male gender | 1.506 (0.607-2.188) | P = 0.868 | ||
| Body mass index | 1.145 (1.071-1.225) | P ＜0.001 | 1.090 (1.020-1.164) | P = 0.012 |
| Non-ambulatory status | 0.373 (0.246-0.564) | P ＜0.001 | 0.530 (0.343-0.818) | P = 0.004 |
| Hypertension | 0.775 (0.519-1.154) | P = 0.210 | ||
| Diabetes mellitus | 0.697 (0.464-1.049) | P = 0.084 | ||
| Coronary artery disease | 0.880 (0.591-1.307) | P = 1.137 | ||
| Cerebrovascular disease | 0.909 (0.497-1.664) | P = 0.757 | ||
| Serum calcium level | 1.110 (0.862-1.429) | P = 0.419 | ||
| Serum phosphorus level | 0.909 (0.810-1.020) | P = 0.106 | ||
| Serum albumin level | 2.232 (1.631-3.049) | P ＜0.001 | 1.692 (1.184-2.415) | P = 0.004 |
| WIfI stage 4 | 0.438 (0.289-0.664) | P ＜0.001 | 0.561 (0.364-0.865) | P = 0.009 |
| HD＞ 6.1 years and P＞ 4.5 mg/dl | 0.577 (0.380-0.874) | P = 0.009 | 0.599 (0.394-0.910) | P = 0.016 |
The model included HD＞ 6.1 years and P＞ 4.5 mg/dl, body mass index, non-ambulatory status, serum albumin level, WIfI stage 4. WIfI, Wound, Ischemia, and foot Infection classification system; HD, hemodialysis; P, phosphorus