Table 1. Characteristics and demographic data.
| Characteristics | Cohort 1* | Cohort 2** |
|---|---|---|
| (n = 1772) | (n = 295) | |
| Age (years), median (range) | 58 (21–100) | 61 (21–100) |
| Gender | ||
| Male, n (%) | 821 (46.3) | 150 (50.8) |
| Female, n (%) | 951 (53.7) | 145 (49.2) |
| Smoking status | ||
| Non-smokers, n (%) | 1179 (66.5) | 177 (60.0) |
| Current/former smokers, n (%) | 593 (33.5) | 118 (40.0) |
| Stage, n (%) | ||
| I | 290 (16.4) | 49 (16.6) |
| II | 81 (4.6) | 18 (6.1) |
| IIIa | 141 (8.0) | 29 (9.8) |
| IIIb | 121 (6.8) | 17 (5.8) |
| IV | 1127 (63.6) | 181 (61.4) |
| N/A | 12 (0.6) | 1 (0.3) |
*Cohort 1: lung adenocarcinoma.
**Cohort 2: epidermal growth factor receptor-wild type lung adenocarcinoma.
N/A, not applicable.