Table 1. Clinicopathologic characteristics of the 1,545 patients in the study.
| Variable | Final pathology | P | ||
|---|---|---|---|---|
| Total (n=1,545) | Non-invasive (n=864) | Invasive (n=681) | ||
| Age, years (mean ± SD) | 55.8±10.6 | 53.1±10.4 | 59.4±9.8 | <0.01 |
| Sex, n (%) | ||||
| Female | 1075 (69.6) | 647 (74.9) | 428 (62.8) | <0.01 |
| Male | 470 (30.4) | 217 (25.1) | 253 (37.2) | |
| Tumor diameter, cm, n (%) | ||||
| ≤1.0 | 912 (59.0) | 758 (87.7) | 154 (22.6) | <0.01 |
| 1.1–2.0 | 551 (35.7) | 89 (10.3) | 449 (65.9) | |
| >2.0 | 82 (5.3) | 17 (2.0) | 78 (11.5) | |
| Tumor location, n (%) | ||||
| RUL | 542 (35.1) | 336 (38.9) | 206 (30.2) | <0.01 |
| RML | 83 (5.4) | 40 (4.6) | 43 (6.3) | |
| RLL | 288 (18.6) | 158 (18.3) | 130 (19.1) | |
| LUL | 462 (29.9) | 247 (28.6) | 215 (31.6) | |
| LLL | 170 (11.0) | 83 (9.6) | 87 (12.8) | |
RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe; LUL, left upper lobe; LLL, left lower lobe; SD, standard deviation.