Table 1 Comparison of clinical characteristics of TCGA-LUAD patients in the training and validation sets
Covariates | Type | Overall set (N = 500) | Training set (N = 252) | Validation set (N = 248) | P value |
|---|---|---|---|---|---|
Age | > = 65 | 271 (54.2%) | 137 (54.4%) | 134 (54.0%) | 0.802 |
< 65 | 219 (43.8%) | 111 (44.0%) | 108 (43.5%) | ||
Unknown | 10 (2%) | 4 (1.6%) | 6 (2.4%) | ||
Gender | Female | 270 (54%) | 141 (56.0%) | 129 (52.0%) | 0.377 |
Male | 230 (46%) | 111 (44.0%) | 119 (48.0%) | ||
Stage | I–II | 387 (77.4%) | 200 (79.4%) | 187 (75.4%) | 0.258 |
III–IV | 105 (21%) | 50 (19.8%) | 55 (22.2%) | ||
Unknown | 8 (1.6%) | 2 (0.8%) | 6 (2.4%) | ||
T | 1–2 | 434 (86.8%) | 218 (86.5%) | 216 (87.1%) | > 0.999 |
3–4 | 63 (12.6%) | 32 (12.7%) | 31 (12.5%) | ||
Unknown | 3 (0.6%) | 2 (0.8%) | 1 (0.4%) | ||
N | 0 | 324 (64.8%) | 164 (65.1%) | 160 (64.5%) | 0.641 |
1–3 | 165 (33%) | 81 (32.1%) | 84 (33.9%) | ||
Unknown | 11 (2.2%) | 7 (2.8%) | 4 (1.6%) | ||
M | 0 | 332 (66.4%) | 173 (68.7%) | 159 (64.1%) | 0.534 |
1 | 24 (4.8%) | 12 (4.8%) | 12 (4.8%) | ||
Unknown | 144 (28.8%) | 67 (26.6%) | 77 (31.0%) |