TABLE 1.
Information of clinical features in the three LUAD sets from TCGA
| Covariates | Type | TCGA set (n = 490) | Testing set (n = 244) | Training set (n = 246) | p‐value |
|---|---|---|---|---|---|
| Age, no (%) | <=65 | 231 (47.14%) | 119 (48.77%) | 112 (45.53%) | 0.3682 a |
| >65 | 249 (50.82%) | 117 (47.95%) | 132 (53.66%) | ||
| Unknow | 10 (2.04%) | 8 (3.28%) | 2 (0.81%) | ||
| Gender, no (%) | Female | 262 (53.47%) | 129 (52.87%) | 133 (54.07%) | 0.8612 a |
| Male | 228 (46.53%) | 115 (47.13%) | 113 (45.93%) | ||
| Stage, no (%) | Stage I–II | 378 (77.14%) | 184 (75.41%) | 194 (78.86%) | 0.179 a |
| Stage III–IV | 104 (21.22%) | 59 (24.18%) | 45 (18.29%) | ||
| Unknow | 8 (1.63%) | 1 (0.41%) | 7 (2.85%) | ||
| T, no (%) | T1‐2 | 426 (86.94%) | 210 (86.07%) | 216 (87.8%) | 0.745 a |
| T3‐4 | 61 (12.45%) | 32 (13.11%) | 29 (11.79%) | ||
| Unknow | 3 (0.61%) | 2 (0.82%) | 1 (0.41%) | ||
| M, no (%) | M0 | 324 (66.12%) | 159 (65.16%) | 165 (67.07%) | 0.0649 a |
| M1 | 24 (4.9%) | 17 (6.97%) | 7 (2.85%) | ||
| Unknow | 142 (28.98%) | 68 (27.87%) | 74 (30.08%) | ||
| N, no (%) | N0 | 317 (64.69%) | 160 (65.57%) | 157 (63.82%) | 0.7003 a |
| N1‐3 | 162 (33.06%) | 78 (31.97%) | 84 (34.15%) | ||
| Unknow | 11 (2.24%) | 6 (2.46%) | 5 (2.03%) |
a
Chi square test.