Association between low level microsatellite instability and patient and tumour characteristics
| Characteristic | n | No with MSI-L (%) | p Value |
|---|---|---|---|
| MSI-low, microsatellite instability low. | |||
| Sex | |||
| Female | 48 | 8 (17) | 0.849 |
| Male | 161 | 25 (16) | |
| Age (y) | |||
| 20–74 | 155 | 25 (16) | 0.820 |
| 75–99 | 54 | 8 (15) | |
| Tumour site | 102 | 16 (16) | 0.968 |
| Colon | |||
| Rectum | 107 | 17 (16) | |
| Tumour size (cm) | 127 | 19 (15) | 0.683 |
| <5 | |||
| ⩾5 | 82 | 14 (17) | |
| Venous invasion | |||
| No | 146 | 26 (18) | 0.223 |
| Yes | 63 | 7 (11) | |
| Direct spread beyond muscularis propria | |||
| No | 26 | 6 (23) | 0.276 |
| Yes | 183 | 27 (15) | |
| Involvement of free serosal surface | |||
| No | 179 | 26 (15) | 0.221 |
| Yes | 30 | 7 (23) | |
| Tumour grade | |||
| Low/average | 154 | 26 (17) | 0.468 |
| High | 55 | 7 (13) | |
| No of nodes involved | |||
| 1–3 | 151 | 22 (15) | 0.435 |
| >3 | 58 | 11 (19) | |
| Apical node involved | |||
| No | 200 | 33 (17) | 0.184 |
| Yes | 9 | 0 (0) | |