Table 1.
Clinical characteristics of 59 patients
| Clinical variable | Low-risk subtype group (n = 31) | High-risk subtype group (n = 28) | pa |
|---|---|---|---|
| Age (y), mean ± SD | 58.48 ± 11.40 | 59.46 ± 9.10 | 0.682 |
| Gender, n (%) | 0.014 | ||
| Male | 7 (22.6) | 15 (53.6) | |
| Female | 24 (77.4) | 13 (46.4) | |
| Smoking, n (%) | 0.046 | ||
| Never smoker | 26 (83.9) | 17 (60.7) | |
| Ever/current smoker | 5 (16.1) | 11 (39.3) | |
| T stage, n (%) | 0.001 | ||
| 1a | 5 (16.1) | 0 (0) | |
| 1b | 14 (45.2) | 3 (10.7) | |
| 1c | 9 (29.0) | 5 (17.9) | |
| 2a | 3 (9.7) | 16 (57.1) | |
| 2b | 0 (0) | 4 (14.3) | |
| TNM stage, n (%) | 0.001 | ||
| IA | 28 (90.3) | 8 (28.6) | |
| IB | 3 (9.7) | 16 (57.1) | |
| IIA | 0 (0) | 4 (14.3) | |
| EGFR mutation | 0.091 | ||
| No | 12 (38.7) | 17 (60.7) | |
| Yes | 19 (61.3) | 11 (39.3) | |
| Subtype proportion (%), mean ± SD | |||
| Lepidic | 90.2 ± 14.0 | 3.8 ± 7.0 | 0.001 |
| Acinar + papillary | 9.8 ± 14.0 | 36.3 ± 22.1 | 0.001 |
| Solid + micropapillary | 0 ± 0 | 59.5 ± 21.1 | 0.001 |
a
Continuous variables were compared using the Mann–Whitney test and categorical variables were compared using χ2 or Fisher’s exact test.