Table 4 The datasets analyzed in this study from GEO and TCGA
|  | GSE39582 (n = 566) | GSE39084 (n = 70) | GSE18088 (n = 53) | GSE75317 (n = 59) | GSE13067 (n = 74) | GSE13294 (n = 155) | TCGA (n = 457) |
|---|---|---|---|---|---|---|---|
Stage | |||||||
 I | 33 | 8 | – | 6 | – | – | 75 |
 II | 264 | 23 | 53 | 24 | – | – | 178 |
 III | 205 | 16 | – | 17 | – | – | 130 |
 IV | 60 | 22 | – | 12 | – | – | 64 |
Microsatellite status | |||||||
 MSI | 75 | 16 | 19 | 11 | 11 | 78 | 11 |
 MSS | 444 | 54 | 34 | 48 | 63 | 77 | 81 |
Location | |||||||
 Right | 224 | 31 | 28 | 26 | – | – | 261 |
 Left | 342 | 30 | 25 | 33 | – | – | 177 |
MSI_proportion | |||||||
Right | 57:154a (27.0%)b | 13:18 (41.9%) | 14:14 (50.0%) | 9:17 (34.6%) | – | – | 10:43 (18.9%) |
Left | 18:290c (5.8%)d | 3:27 (10.0%) | 5:20 (20.0%) | 2:31 (6.1%) | – | – | 1:33 (2.9%) |
MSI detection | PCR | PCR or IHC | PCR | PCR | PCR | PCR | PCR |
Adjuvant chemotherapy | |||||||
 Yes | 233 | – | – | – | – | – | – |
 No | 316 | – | 53 | – | – | – | – |