Table 2 Chi-square test results of the TCGA training set, the test set and the ICGC cohort
Characteristics |  | TCGA |  | ICGC n = 229 | P-value |
|---|---|---|---|---|---|
Train (set1) n = 171 | Test (set2) n = 171 | Sum (set3) n = 342 | |||
Gender | |||||
 Male | 125(73.1%) | 110(64.3%) | 233(68.1%) | 168(73.4%) | 0.103 |
 Female | 46(26.9%) | 61(35.7%) | 109(31.9%) | 61(26.6) |  |
Age | |||||
 <  = 65 | 108(63.2%) | 109(63.2%) | 216(63.2%) | 88(38.4%) | 0.911 |
 > 65 | 63(36.8%) | 62(36.8%) | 126(36.8%) | 141(61.6%) |  |
Status | |||||
 Alive | 113(66.1%) | 110(64.3%) | 223(65.2%) | 189(82.5%) | 0.733 |
 Dead | 58(33.9%) | 61(35.7%) | 119(34.8%) | 40(17.5%) |  |