Risk factors | N | Infection | Rate* | Relative risk | |||
---|---|---|---|---|---|---|---|
Crude | 95% CI | Adjusted** | 95% CI | ||||
Duration of antibiotic prophylaxis | |||||||
None | 167 | 5 | 3.0 | 1.00 | Reference | 1.00 | Reference |
1 day | 1159 | 12 | 1.0 | 0.34 | 0.12–0.97 | 0.30 | 0.10–0.89 |
>1 day | 813 | 9 | 1.1 | 0.36 | 0.12–1.09 | 0.29 | 0.09–0.92 |
Duration of operation | |||||||
≤ 1.0 hour | 1738 | 16 | 0.9 | 1.00 | Reference | 1.00 | Reference |
>1.0 hour | 401 | 10 | 2.5 | 2.75 | 1.24–6.11 | 3.29 | 1.44–7.52 |
Age | |||||||
1–20 years | 808 | 6 | 0.7 | 1.00 | Reference | 1.00 | Reference |
21–40 years | 853 | 14 | 1.6 | 2.23 | 0.85–5.83 | 2.15 | 0.82–5.68 |
41–60 years | 382 | 5 | 1.3 | 1.77 | 0.54–5.85 | 1.91 | 0.57–6.48 |
>60 years | 96 | 1 | 1.0 | 1.41 | 0.17–11.81 | 2.11 | 0.22–20.76 |
Type of operation | |||||||
Elective | 591 | 9 | 1.5 | 1.00 | Reference | 1.00 | Reference |
Emergency | 1548 | 17 | 1.1 | 0.72 | 0.32–1.62 | 0.78 | 0.33–1.83 |
Total | 2139 | 26 | 1.2 | - | - | - | - |