Table 1.
Distribution of a subset of clinical and therapy-related variables in patients with surgical site infection and in controls.
| Risk factor | SSI group (N=12) | Non-SSI group (N=507) | Odds ratio (95% confidence interval) | p-value |
|---|---|---|---|---|
| Smoking history‡ | 4 | 65 | 3.40 (1.00–11.61) | 0.039† |
| Fracture grade‡ | ||||
| Closed | 3 | 418 | (Reference) | |
| Gustilo I | 2 | 49 | 5.69 (0.93–34.87) | <0.001† |
| Gustilo II | 5 | 32 | 21.77 (4.98–95.24) | |
| Gustilo III | 2 | 8 | 34.83 (5.10–237.86) | |
| AO/OTC‡ | ||||
| 43.A | 2 | 200 | (Reference) | 0.013† |
| 43.B | 7 | 278 | 2.52 (0.52–12.25) | |
| 43.C | 3 | 29 | 10.35 (1.66–64.56) | |
| Duration of surgery (min)* | 156.67±38.57 | 132.36±24.78 | - | 0.001† |
| Use of a drain‡ | 6 | 212 | 1.39 (0.44–4.37) | 0.570 |
| Time from injury to surgery (days)* | 8.12±3.23 | 8.55±3.67 | - | 0.688 |
| Estimated blood loss (mL)* | 149.39±37.13 | 143.32±33.88 | - | 0.541 |
| Bone graft use‡ | 3 | 34 | 4.64 (1.20–17.93) | 0.015† |
| Temporary external fixation (treated in two stages)‡ | 1 | 123 | 0.28 (0.04–2.22) | 0.201 |
| Tourniquet use‡ | 8 | 385 | 0.63 (0.19–2.14) | 0.459 |
| Definitive fixation‡ | 0.985 | |||
| External fixation with limited internal fixation | 1 | 43 | (Reference) | |
| Open reduction internal fixation (ORIF) | 11 | 464 | 1.02 (0.13–8.09) | |
| Surgery approach (ORIF group only, N=475)‡ | 0.934 | |||
| Anterior | 2 | 66 | (Reference) | |
| Anterolateral | 3 | 103 | 0.96 (0.16–5.91) | |
| Anteromedial | 5 | 228 | 0.72 (0.14–3.82) | |
| Posteromedial | 0 | 18 | - | |
| Medial | 1 | 29 | 1.14 (0.10–13.05) | |
| Posterolateral | 0 | 20 | - | |
| Total no. of persons in the operating room (x11)* | 8.17±2.44 | 5.89±1.38 | - | 0.001† |
*The values are presented as the means and the standard deviation. †Significant at p=0.05. ‡The values are presented as the number of patients or controls followed by the percentage in parentheses.