Table 1.2.
One-year major limb amputation rate by Society for Vascular Surgery (SVS) Wound, Ischemia, and foot Infection (WIfI) clinical stage
| Study (year): No. of limbs at risk | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
|---|---|---|---|---|
|
| ||||
| Cull68 (2014): 151 | 37 (3) | 63 (10) | 43 (23) | 8 (40) |
| Zhan69 (2015): 201 | 39 (0) | 50 (0) | 53 (8) | 59 (64)a |
| Darling71 (2016): 551 | 5 (0) | 110 (10) | 222 (11) | 213 (24) |
| Causey70 (2016): 160 | 21 (0) | 48 (8) | 42 (5) | 49 (20) |
| Beropoulis163 (2016): 126 | 29 (13) | 42 (19) | 29 (19) | 26 (38) |
| Ward166 (2017): 98 | 5 (0) | 21 (14) | 14 (21) | 58 (34) |
| Darling164 (2017): 992 | 12 (0) | 293 (4) | 249 (4) | 438 (21) |
| Robinson72 (2017): 280 | 48 (2.1) | 67 (7.5) | 64 (7.8) | 83 (17) |
| Mathioudakis165 (2017): 217 | 95 (4) | 33 (3) | 87 (5) | 64 (6) |
| Tokuda167 (2018): 163 | 16 (0) | 30 (10) | 56 (10.7) | 61 (34.4) |
| N = 2982 (weighted mean) | 307 (3.2) | 757 (7.0) | 859 (8.7) | 1059 (23.3) |
| Median (1-year major limb amputation) | 0% | 9% | 9.4% | 29% |
The number of limbs at risk in each WIfI stage is given, with percentage of amputations at 1 year in parentheses. Means in totals (in parentheses) are weighted.
a
Falsely elevated because of inadvertent inclusion of stage 5 (unsalvageable) limbs.