Table 3. Hospital course and factors in association with the outcome.
| Amputation (N = 11) | No amputation (N = 42) | p value | |||
| n | Median (IQR) | n | Median (IQR) | ||
| Age (year) | 11 | 46 (21-60) | 42 | 39 (29-62) | 0.622 |
| Time-amp (hr) | 11 | 99 (56-170) | -- | -- | |
| ICU stay (day) | 11 | 13 (7-25) | 42 | 1.5 (0-9) | 0.001 |
| Hospital stay (day) | 11 | 48 (18-68) | 42 | 23 (11-35) | 0.025 |
| IA duration (day) | 11 | 0 (0-2) | 42 | 0 (0-0) | 0.039 |
| pRBC-T (unit) | 11 | 34 (8-50) | 42 | 18 (6-22) | 0.086 |
| Readmission | 11 | 0 (0-0) | 39 | 1 (0-2) | 0.016 |
| LSI* | 11 | 7 (6-8) | 34 | 4 (2-6) | 0.001 |
| MESS | 11 | 8 (5-10) | 42 | 6 (5-8) | 0.092 |
| PSI* | 11 | 9 (8-10) | 34 | 6 (5-8) | 0.004 |
| M-LSI* | 11 | 6 (5-7) | 34 | 3 (2-5) | 0.001 |
| M-MESS | 11 | 7 (5-9) | 42 | 6 (5-7) | 0.048 |
| M-PSI* | 11 | 8 (7-9) | 34 | 5 (4-7) | 0.003 |
| P-OS (min) | 7 | 70 (55-89) | 12 | 71 (56-119) | 0.735 |
| Later operation# | 11 | 4 (1-7) | 42 | 2 (1-5) | 0.246 |
| Time-VR (min) | 11 | 258 (194-317) | 42 | 221.5 (155-307) | 0.263 |
p value by Mann-Whitney U Test.
* (M-)LSI and (M-)PSI are used to assess lower limb trauma. # Number of additional surgical interventions after the initial vascular repair.
hr, hour; IA, inotropic agent; ICU, intensive care unit; IQR, interquartile range represents the distance between the 25th and 75th percentiles; LSI, limb salvage index; M-, modified amputation index (excluding the time factor); MESS, mangled extremity severity score; P-OS, delay from orthopedic surgery prior to the vascular repair; pRBC-T, amounts of pack red blood cell transfusion; PSI, predictive salvage index; Time-amp, duration between initial vascular repair and amputation; Time-VR, surgical time of vascular repair.