Table 2.
Baseline perfusion by wound closure technique
| Outcome | Group | Number | Mean (SD*) | p value† | Pairwise comparisons‡ |
|---|---|---|---|---|---|
| MIP | Staple | 15 | 19 (7) | Running subcuticular versus staple (DMIP = 45.0; 95% CI, 32.1–57.9; p < 0.001) | |
| Vertical mattress | 15 | 32 (18) | < 0.001 | Running subcuticular versus vertical mattress (DMIP = 32.0; 95% CI, 19.1–45.0; p < 0.001) | |
| Running subcuticular | 15 | 64 (16) | Vertical mattress versus staple (DMIP = 13.0; 95% CI, 0.0–25.9; p = 0.05) | ||
| Staple | 15 | 19 (4)§ | Running subcuticular versus staple (DMIP = 41.1; 95% CI, 28.2–54.0; p < 0.001) | ||
| Vertical mattress | 15 | 29 (4)§ | < 0.001 | Running subcuticular versus vertical mattress (DMIP = 31.0; 95% CI, 18.6–43.5; p < 0.001) | |
| Running subcuticular | 15 | 60 (4)§ | Vertical mattress versus staple (DMIP = 10.1; 95% CI, 2.7–22.9; p = 0.15) | ||
| MPI | Staple | 15 | 69 (27) | Staple versus running subcuticular (DMPI = 48.0; 95% CI, 28.6–67.4; p < 0.001) | |
| Vertical mattress | 15 | 37 (24) | < 0.001 | Staple versus vertical mattress (DMPI = 31.7; 95% CI, 12.3–51.1; p < 0.001) | |
| Running subcuticular | 15 | 21 (12) | Vertical mattress versus running subcuticular (DMPI = 16.4; 95% CI, −3.1 to 35.8; p = 0.11) | ||
| Staple | 15 | 71 (6)§ | Staple versus running subcuticular (DMPI = 54.1; 95% CI, 34.3–73.9; p < 0.001) | ||
| Vertical mattress | 15 | 34 (6)§ | < 0.001 | Staple versus vertical mattress (DMPI = 36.5; 95% CI, 16.8–56.1; p < 0.001) | |
| Running subcuticular | 15 | 17 (6)§ | Vertical mattress versus running subcuticular (DMPI = 17.6; 95% CI, −1.5 to 36.7; p = 0.08) |
* Value listed for adjusted means is the SE; †analysis of variance p value; ‡individual pairwise comparisons with difference of means (either DMIP or DMPI), 95% CI for difference in means, and p values based on the Tukey method to guard against an increased Type I error probability resulting from multiple comparisons; §mean and SE adjusted for age, gender, and body mass index; MIP = mean incision perfusion; MPI = mean perfusion impairment; DMIP = difference in mean incision perfusion; DMPI = difference in mean perfusion impairment; CI = confidence interval.