Table S1. The results based on the 8th edition of TNM staging system.
| Characteristics | Never-smoker | Pack-years <30 | Pack-years ≥30 | Total |
|---|---|---|---|---|
| Number of lesions stage [n=152] | 77 (100.0) | 34 (100.0) | 41 (100.0) | 152 (100.0) |
| 0 | 26 (33.8) | 9 (26.5) | 3 (7.3) | 38 (25.0) |
| IA1 | 37 (48.1) | 17 (50.0) | 20 (48.8) | 74 (48.7) |
| IA2 | 6 (7.8) | 3 (8.8) | 7 (17.1) | 16 (10.5) |
| IA3 | 3 (3.9) | 1 (2.9) | 3 (7.3) | 7 (4.6) |
| IB | 2 (2.6) | 3 (8.8) | 2 (4.9) | 7 (4.6) |
| IIB | 0 (0.0) | 1 (2.9) | 2 (4.9) | 3 (2.0) |
| IIIA | 1 (1.3) | 0 (0.0) | 2 (4.9) | 3 (2.0) |
| IIIB | 1 (1.3) | 0 (0.0) | 1 (2.4) | 2 (1.3) |
| IVA | 1 (1.3) | 0 (0.0) | 1 (2.4) | 2 (1.3) |
Data presented as number (percentage).