Table 1 Other possible risk factors for infection and length of stay
Preoperative parameter | Value | Missing values (%) |
|---|---|---|
Age in years (mean ± SD) | 62.4 ± 10.0 | 0 |
Male sex (n [%]) | 127 (84.1) | 0 |
ASA | Â | 0 |
   Class I (n [%]) | 47 (31.1) |  |
   Class II (n [%]) | 104 (68.9) |  |
History of cardiac valve disease or arrhythmia (n [%]) | 7 (4.6) | 0.7 |
History of hypertension (n [%]) | 21 (13.9) | 0.7 |
History of coronary artery disease (n [%]) | 16 (10.6) | 0.7 |
BMI (mean ± SD) | 25.4 ± 3.3 | 25.8 |
Percentage of expected FEV1 (mean ± SD) | 101 ± 18 | 18.5 |
Diabetes mellitus (n [%]) | 9 (6.0) | 0.7 |
Preoperative weight loss (kg; mean ± SD) | 5.3 ± 6.6 | 7.9 |
Clinical staging of tumor | Â | 1.3 |
   Stage I (n [%]) | 18 (11.9) |  |
   Stage II (n [%]) | 68 (45.0) |  |
   Stage III (n [%]) | 58 (38.4) |  |
   Stage IV (n [%]) | 5 (3.3) |  |
Allocated to transthoracic procedure (n [%]) | 78 (51.7%) | 0 |
Duration of surgery (hours; mean ± SD) | 5.3 (1.6) | 0.7 |
Insulin use within 48 hours after surgery (n [%]) | 9 (6.0%) | 9.2 |