Table 2.
Unadjusted association of selected variables and SSIs
| Variable | SSI (Number) | No SSI (Number) | OR | CI (95%) | P value |
|---|---|---|---|---|---|
| Age | |||||
| <60 yeas | 20 | 68 | 1 | – | <0·0001 |
| ≥60 years | 57 | 773 | 3·9 | 3·3–4·6 | |
| Diabetes | |||||
| No | 61 | 799 | 1 | – | |
| Yes | 16 | 42 | 4·9 | 4·0–6·1 | <0·0001 |
| Smoking | |||||
| No | 61 | 776 | 1 | – | |
| Yes | 16 | 65 | 3·1 | 2·5–3·7 | <0·0001 |
| Obesity | |||||
| No | 64 | 801 | 1 | – | |
| Yes | 13 | 40 | 4·1 | 3·2–5·1 | <0·0001 |
| Type of operation | |||||
| Elective | 44 | 433 | 1 | – | |
| Emergency | 39 | 402 | 1·1 | 0·9–1·1 | 0·23 |
| Wound drain | |||||
| No | 41 | 567 | 1 | – | |
| Yes | 43 | 267 | 2·2 | 2·0–2·4 | <0·0001 |
CI, confidence interval; OR, odds ratio; SSI, surgical site infection.