Hazard ratio (95% CI) | p-value | |
Age | ||
<74 years | 1 | |
≥75 years | 1.57 (1.22–2.04) | <0.001 |
Calendar year | ||
1991–2000 | 1 | |
2001–2010 | 0.86 (0.67–1.10) | 0.23 |
Mode of detection | ||
Symptoms | 1 | |
Chest radiography | 0.95 (0.70–1.27) | 0.71 |
CT | 0.55 (0.31–0.98) | 0.04 |
Operation type | ||
Pneumonectomy | 1 | |
Lobectomy | 0.69 (0.48–0.98) | 0.04 |
Wedge resection | 1.08 (0.64–1.79) | 0.78 |
Tumour histology | ||
Squamous cell | 1 | |
Adenocarcinoma | 1.32 (0.99–1.77) | 0.06 |
Large cell | 0.50 (0.13–1.96) | 0.32 |
Adenosquamous | 1.56 (0.81–3.01) | 0.18 |
Tumour grade | ||
Well differentiated | 1 | |
Moderate or poorly differentiated | 1.33 (0.88–2.03) | 0.18 |
Undifferentiated | 5.11 (1.15–22.63) | 0.03 |
Tumour size (per cm increase) | 0.99 (0.99–1.00) | 0.38 |
CT: computed tomography.