Table 1 Comparison of preoperative characteristics of patients with and without surgical site infections
All (n = 188) | Surgical site infection | χ2 | P value | |||
|---|---|---|---|---|---|---|
No (n = 141) | Yes (n = 47) | |||||
Sex | Male | 92 | 71 | 21 | 0.454 | 0.5 |
Female | 96 | 70 | 26 | |||
Weight | W ≤ 1500 g | 8 | 1 (12.5%) | 7 (87.5%) | 43.262 | 0.000 |
1500 g < w ≤ 2000 g | 50 | 30 (60%) | 20 (40%) | |||
2000 g < w ≤ 2500 g | 50 | 41 (82%) | 9 (18%) | |||
2500 g < w ≤ 3000 g | 20 | 11 (55%) | 9 (45%) | |||
W > 3000 g | 60 | 58 (96.7%) | 2 (3.3%) | |||
Age at operation | ≤1 d | 13 | 2 (15.4%) | 11 (84.6%) | 111.572 | 0.000 |
1<age ≤ 3 d | 25 | 4 (16%) | 21 (84%) | |||
3<age ≤ 7 d | 26 | 14 (53.8%) | 12 (46.2%) | |||
7<age ≤ 14 d | 49 | 46 (93.9%) | 3 (6.1%) | |||
>14 d | 75 | 75 (100%) | 0 | |||
Genetic anomaly | no | 171 | 129 (75.4%) | 42 (24.6%) | 0.022 | 0.883 |
yes | 17 | 12 (70.6%) | 5 (29.4%) | |||
Prematurity (≤37w) | no | 133 | 124 (93.2%) | 9 (6.8%) | 80.606 | 0.000 |
yes | 55 | 17 (30.9%) | 38 (69.1%) | |||