Table 2.
Postoperative outcomesa
| Characteristics | Total (N=1,025) | SIS=0 (N=470) | SIS=1 (N=413) | P1-value | SIS=2 (N=142) | P2-value |
|---|---|---|---|---|---|---|
| Overall morbidity | ||||||
| Any morbidity | 319 (31.1%) | 124 (26.4%) | 125 (30.3%) | 0.20 | 70 (49.3%) | <0.001 |
| Minor morbidity (Clavien-Dindo Grade II) | 284 (27.7%) | 111 (23.6%) | 109 (26.4%) | 0.34 | 64 (45.1%) | <0.001 |
| Major morbidity (Clavien-Dindo Grade ≥III) | 152 (14.8%) | 54 (11.5%) | 62 (15.0%) | 0.12 | 36 (25.4%) | <0.001 |
| In-hospital mortality | 3 (0.3%) | 1 (0.2%) | 2 (0.5%) | 0.60 | 0 (0.0%) | 1.0 |
| Individual complications | ||||||
| Prolonged air leak (>5 days) | 152 (14.8%) | 47 (10.0%) | 65 (15.7%) | 0.011 | 40 (28.2%) | <0.001 |
| Pneumonia | 118 (11.5%) | 36 (7.7%) | 48 (11.6%) | 0.045 | 34 (23.9%) | <0.001 |
| Atelectasis | 95 (9.3%) | 45 (9.6%) | 35 (8.5%) | 0.57 | 15 (10.6%) | 0.73 |
| Subcutaneous emphysema | 73 (7.1%) | 26 (5.5%) | 28 (6.8%) | 0.44 | 19 (13.4%) | 0.002 |
| Pneumothorax | 49 (4.8%) | 26 (5.5%) | 17 (4.1%) | 0.33 | 6 (4.2%) | 0.54 |
| Pleural effusion requiring chest tube drainage | 30 (2.9%) | 9 (1.9%) | 5 (1.2%) | 0.40 | 16 (11.3%) | <0.001 |
| Hemoptysis requiring medical care | 29 (2.8%) | 11 (2.3%) | 8 (1.9%) | 0.68 | 10 (7.0%) | 0.015 |
| Sinus irregularity requiring medical care | 17 (1.7%) | 9 (1.9%) | 4 (1.0%) | 0.24 | 4 (2.8%) | 0.75 |
| Chylothorax | 15 (1.5%) | 2 (0.4%) | 9 (2.2%) | 0.019 | 4 (2.8%) | 0.028 |
| Atrial arrhythmia | 11 (1.1%) | 3 (0.6%) | 6 (1.5%) | 0.32 | 2 (1.4%) | 0.33 |
| Ventricular arrhythmia | 3 (0.3%) | 1 (0.2%) | 0 (0.0%) | 1.0 | 2 (1.4%) | 0.14 |
| Pulmonary artery embolism | 8 (0.8%) | 6 (1.3%) | 2 (0.5%) | 0.30 | 0 (0.0%) | 0.35 |
| Acute respiratory distress syndrome | 4 (0.4%) | 0 (0.0%) | 4 (1.0%) | 0.047 | 0 (0.0%) | — |
| Hemothorax | 2 (0.2%) | 0 (0.0%) | 2 (0.5%) | 0.22 | 0 (0.0%) | — |
| Bronchial fistula | 1 (0.1%) | 0 (0.0%) | 1 (0.2%) | 0.47 | 0 (0.0%) | — |
| Wound infection | 4 (0.4%) | 2 (0.4%) | 2 (0.5%) | 1.0 | 0 (0.0%) | 1.0 |
| Gastrointestinal discomforts requiring medical care | 13 (1.3%) | 5 (1.1%) | 8 (1.9%) | 0.28 | 0 (0.0%) | 0.60 |
| Urinary retention | 7 (0.7%) | 3 (0.6%) | 2 (0.5%) | 1.0 | 2 (1.4%) | 0.33 |
Notes: aP1-value indicates demographic differences between patients with SIS=1 and with SIS=0. P2-value indicates demographic differences between patients with SIS=2 and with SIS=0.
Abbreviation: SIS, systemic inflammation score.