| No | Mortality | Univariate analysis | Multivariate analysis | ||||
| N (%) | OR (95% CI) | p Value | OR (95% CI) | p Value | β | ||
| Intercept | −5.97 | ||||||
| Sex | <0.001 | 0.003 | |||||
| Female | 1647 | 41 (2.5) | 1.00 (reference) | 1.00 (reference) | |||
| Male | 2748 | 152 (5.5) | 2.29 (1.62 to 3.26) | 1.76 (1.22 to 2.54) | 0.56 | ||
| Age (years) | <0.001 | <0.001 | |||||
| <50 | 380 | 9 (2.4) | 1.00 (reference) | 1.00 (reference) | |||
| 50–59 | 924 | 22 (2.4) | 1.01 (0.50 to 2.20) | 1.04 (0.47 to 2.30) | 0.038 | ||
| 60–69 | 1487 | 51 (3.4) | 1.46 (0.71 to 3.00) | 1.59 (0.77 to 3.30) | 0.47 | ||
| 70–79 | 1471 | 93 (6.3) | 2.78 (1.39 to 5.57) | 3.38 (1.66 to 6.89) | 1.22 | ||
| 80–89 | 133 | 18 (13.5) | 6.45 (2.82 to 14.75) | 9.94 (4.17 to 23.69) | 2.30 | ||
| Side of resection | <0.001 | 0.001 | |||||
| Left | 1991 | 63 (3.2) | 1.00 (reference) | 1.00 (reference) | |||
| Right | 2404 | 130 (5.4) | 1.75 (1.29 to 2.38) | 1.73 (1.24 to 2.41) | 0.55 | ||
| Surgical approach | 0.12 | 0.39 | |||||
| VATS | 132 | 2 (1.5) | 1.00 (reference) | 1.00 (reference) | |||
| Open thoracotomy | 4263 | 191 (4.5) | 3.05 (0.75 to 12.41) | 1.88 (0.44 to 7.97) | 0.63 | ||
| Surgical procedure | <0.001 | <0.001 | |||||
| Upper lobectomy | 1520 | 30 (2.0) | 1.00 (reference) | 1.00 (reference) | |||
| Middle lobectomy | 124 | 2 (1.6) | 0.82 (0.19 to 3.46) | 0.61 (0.14 to 2.61) | −0.50 | ||
| Lower lobectomy | 1019 | 35 (3.4) | 1.72 (1.05 to 2.83) | 1.52 (0.92 to 2.52) | 0.42 | ||
| Bilobectomy | 383 | 28 (7.3) | 3.92 (2.31 to 6.65) | 3.06 (1.76 to 5.34) | 1.12 | ||
| Pneumonectomy | 1071 | 92 (8.6) | 4.66 (3.06 to 7.10) | 4.54 (2.87 to 7.18) | 1.51 | ||
| Sublobar resection | 278 | 6 (2.2) | 1.14 (0.47 to 2.76) | 0.92 (0.37 to 2.26) | −0.086 | ||
| Histopathology type | 0.025 | 0.27 | |||||
| Adenocarcinoma | 1865 | 64 (3.4) | 1.00 (reference) | 1.00 (reference) | |||
| Squamous cell | 1565 | 83 (5.3) | 1.58 (1.13 to 2.20) | 1.08 (0.75 to 1.55) | 0.078 | ||
| Other | 965 | 46 (4.8) | 1.41 (0.96 to 2.07) | 1.38 (0.92 to 2.08) | 0.32 | ||
| Pathological stage | <0.001 | 0.066 | |||||
| I | 2856 | 103 (3.6) | 1.00 (reference) | 1.00 (reference) | |||
| II | 1018 | 54 (5.3) | 1.50 (1.07 to 2.10) | 1.15 (0.81 to 1.65) | 0.14 | ||
| III | 428 | 25 (5.8) | 1.66 (1.06 to 2.60) | 1.24 (0.77 to 2.00) | 0.21 | ||
| IV | 93 | 11 (11.8) | 3.59 (1.85 to 6.93) | 2.67 (1.29 to 5.54) | 0.98 | ||
| Hospital volume | 0.053 | 0.076 | |||||
| <20 | 1476 | 77 (5.2) | 1.00 (reference) | 1.00 (reference) | |||
| ⩾20 | 2919 | 116 (4.0) | 0.75 (0.56 to 1.00) | 0.76 (0.56 to 1.03) | −0.28 | ||
| Tumour size (cm) | 0.002 | 0.84 | |||||
| ⩽3 | 1877 | 61 (3.2) | 1.00 (reference) | 1.00 (reference) | |||
| >3–5 | 1409 | 62 (4.4) | 1.37 (0.96 to 1.97) | 0.93 (0.64 to 1.36) | −0.073 | ||
| >5 | 1043 | 66 (6.3) | 2.01 (1.41 to 2.87) | 1.10 (0.74 to 1.62) | 0.095 | ||
| Unknown | 66 | 4 (6.1) | 1.92 (0.68 to 5.45) | 1.16 (0.39 to 3.40) | 0.14 | ||
OR, odds ratio; CI, confidence interval; β, coefficient beta; VATS, video assisted thoracic surgery.