Table 3.
Results of univariate analysis of predictors of death after VAC‐treated deep sternal wound infection
| Variable | Late death | Late survivors | P value | OR | 95% CI | ||
|---|---|---|---|---|---|---|---|
| n | (%) | n | (%) | ||||
| Number of patients | 18 | 35 | |||||
| Age* (years) | 70·5 ± 10·1 | 66·7 ± 10·5 | 0·204 | NA | NA | ||
| EuroSCORE* | 8·3 ± 4·3 | 7·1 ± 3·7 | 0·297 | NA | NA | ||
| Time to diagnosis (days)* | 19·4 ± 16·9 | 13·7 ± 5·0 | 0·065 | NA | NA | ||
| Duration of VAC therapy* (days) | 15·2 ± 14·7 | 10·2 ± 4·4 | 0·068 | NA | NA | ||
| Total length of stay* (days) | 31·2 ± 24·7 | 22·0 ± 11·7 | 0·070 | NA | NA | ||
| Open heart surgery | |||||||
| CABG only | 11 | 61 | 25 | 71 | 0·446 | 0·629 | 0·16–2·51 |
| Other procedure(s) | 7 | 39 | 10 | 29 | 0·446 | 0·629 | 0·16–2·51 |
| Age >80 years | 3 | 17 | 4 | 11 | 0·678 | 1·55 | 0·20–10·4 |
| Female gender | 3 | 17 | 11 | 31 | 0·333 | 0·44 | 0·68–2·07 |
| Diabetes mellitus | 8 | 44 | 17 | 49 | 0·776 | 0·85 | 0·23–3·07 |
| Obesity (BMI >30) | 8 | 44 | 16 | 46 | 0·930 | 0·95 | 0·26–3·44 |
| COPD | 6 | 33 | 5 | 14 | 0·105 | 3·00 | 0·62–14·7 |
| LVEF <30% | 3 | 17 | 9 | 26 | 0·730 | 0·58 | 0·88–2·84 |
| Renal failure† | 3 | 17 | 3 | 9 | 0·397 | 2·13 | 0·25–17·6 |
| Preoperative stroke | 3 | 17 | 3 | 9 | 0·397 | 2·13 | 0·25–17·6 |
| Peripheral artery disease | 5 | 28 | 6 | 17 | 0·478 | 1·86 | 0·37–8·78 |
| Emergency surgery | 3 | 17 | 4 | 11 | 0·678 | 1·55 | 0·20–10·4 |
| MI <90 days preoperation | 7 | 39 | 14 | 40 | 0·938 | 0·95 | 0·25–3·51 |
| El Oakley class ≥III | 13 | 72 | 24 | 69 | 0·784 | 1·19 | 0·30–5·34 |
| VAC changes ≥4 | 7 | 39 | 9 | 26 | 0·323 | 1·84 | 0·45–7·23 |
BMI, body mass index; CABG, coronary artery bypass grafting; CI, confidence interval; COPD, chronic obstructive pulmonary disease; LVEF, left ventricular ejection fraction; MI, myocardial infarction; NA, not applicable; OR, odds ratio; VAC, vacuum‐assisted closure.
*
Mean ± standard deviation.
†
Serum creatinine >200 μmol/l (2·27 mg/dl).