Table 2. Subgroup analyses for the incidence of surgical site infection between different prophylactic antibiotic regimens.
| Variables | Preoperative only, n (%) | Pre + intraoperative, n (%) | χ2 | P |
|---|---|---|---|---|
| Age, years | ||||
| <60 | 10 (4.1%) | 28 (3.1%) | 0.60 | 0.44 |
| ≥60 | 10 (8.5%) | 12 (2.1%) | – | <0.01a |
| Gender | ||||
| Female | 3 (1.9%) | 13 (2.1%) | – | 1.00a |
| Male | 17 (8.5%) | 27 (3.1%) | 11.77 | <0.01 |
| BMI (kg/m2) | ||||
| <24 | 6 (3.2%) | 20 (2.5%) | – | 0.61a |
| ≥24 | 14 (8.0%) | 20 (3.0%) | 9.09 | <0.01 |
| Smoking status | ||||
| No | 12 (5.3%) | 26 (2.8%) | 3.65 | 0.06 |
| Yes | 8 (6.0%) | 14 (2.6%) | – | 0.06 |
a, Fisher’s exact test. BMI, body mass index.