TABLE 1.
Basic characteristics of the gene expression profile data. LUAD, lung adenocarcinoma.
| Record | Platform | Normal | LUAD | Number of excluded samples | Country | Year |
| TCGA | IIIumina HiSeq | 57 | 385 | 134 | United States | 2018 |
| GSE13213 | GPL6480 Agilent-014850 Whole Human Genome Microarray 4 × 44K G4112F (Probe Name version) | 0 | 117 | 0 | Japan | 2009 |
| GSE31210 | GPL570 [HG-U133_Plus_2] Affymetrix Human Genome U133 Plus 2.0 Array | 0 | 226 | 0 | Japan | 2011 |
| GSE26939 | GPL9053 Agilent-UNC-custom-4 × 44K | 0 | 116 | 0 | United States | 2012 |
| GSE32867 | GPL6884 Illumina HumanWG-6 v3.0 expression beadchip | 58 | 58 | 0 | United States | 2012 |
| GSE41271 | GPL6884 Illumina HumanWG-6 v3.0 expression beadchip | 0 | 182 | 93 | United States | 2013 |
| GSE43458 | GPL6244 [HuGene-1_0-st] Affymetrix Human Gene 1.0 ST Array [transcript (gene) version] | 30 | 80 | 0 | United States | 2013 |