Table 3 Comparisons of the constituent ratios of pivot point, length-width ratio (LWR), width of the skin island, and top-edge location
Survival flaps (n = 47), n (%) | Partial necrosis flaps (n = 9), n (%) | p* | |
|---|---|---|---|
Pivot point (above the tip of the lateral malleolus) | 1.000 | ||
≤ 7 cm | 41 (83.7) | 8 (16.3) | |
> 7 cm | 6 (85.7) | 1 (14.3) | |
Length-to-width ratio | 0.656 | ||
< 5:1 | 8 (80.0) | 2 (20.0) | |
≥ 5:1 | 39 (84.8) | 7 (15.2) | |
Width of the skin island | 1.000 | ||
< 8 cm | 11 (81.8) | 2 (18.2) | |
≥ 8 cm | 36 (83.7) | 7 (16.3) | |
Top-edge location | 0.005 | ||
8th zone | 35 (94.6) | 2 (5.4) | |
9th zone | 12 (63.2) | 7 (36.8) |