Table 1.
The clinicopathological characteristics of enrolled patients.
| Characteristics | N=935 |
|---|---|
| Age, median (range) | 62 (29–84) |
| Gender, n (%) | |
| Male | 374 (40.0) |
| Female | 561 (60.0) |
| Smoking history, n (%) | |
| Ever smoker | 301 (32.2) |
| Never smoker | 634 (67.8) |
| Cancer description | |
| Median size (cm) (minimum–maximum) | 1.6 (0.5–4.8) |
| Range of resection, n (%) | |
| PEN | 1 (0.1) |
| LOB | 410 (43.9) |
| SEG | 327 (35.0) |
| WED | 197 (21.1) |
| pT staging, n (%) | |
| pT1a | 116 (12.4) |
| pT1b | 509 (54.4) |
| pT1c | 184 (19.7) |
| pT2a | 121 (12.9) |
| pT2b | 5 (0.5) |
| pN staging, n (%) | |
| pN0 | 857 (91.7) |
| pN1 | 36 (3.9) |
| pN2 | 42 (4.5) |
| pTNM staging, n (%) | |
| IA | 763 (81.6) |
| IB | 90 (9.6) |
| IIA | 4 (0.4) |
| IIB | 36 (3.8) |
| IIIA | 42 (4.4) |
| cT staging, n (%) | |
| cT1a | 82 (8.8) |
| cT1b | 502 (53.7) |
| cT1c | 351 (37.5) |
LOB, lobectomy; PEN, pneumonectomy; SEG, segmentectomy; TNM staging, tumor node metastasis staging; WED, wedge resection.