Table 1.
Baseline characteristics of patients with lung adenocarcinoma in the training cohort
| Variable | Baseline characteristics (n = 751) |
|---|---|
| Affymetrix® platform | |
| HG-U133 Plus 2.0 (GPL570) | 313 (41.7) |
| HG-U133A (GPL96) | 438 (58.3) |
| Age | 64.6 ± 10.0 |
| Sex | |
| Male | 394 (52.5) |
| Female | 357 (47.5) |
| Tumor stage | |
| Stage I | 515 (68.6) |
| Stage II–III | 232 (30.9) |
| Stage IV | 4 (0.5) |
| Smoking status | |
| Current smoker | 67 (8.9) |
| Ex-smoker | 322 (42.9) |
| Non-smoker | 71 (9.5) |
| Unknown | 291 (38.7) |
| Adjuvant chemotherapy | |
| Yes | 102 (13.6) |
| No | 377 (50.2) |
| Unknown | 272 (36.2) |
Continuous data (age) was presented as mean ± standard deviation and categorical data as number (proportion of that the subgroup accounted for the whole group)