Table 1. Results of Chi-Squared tests of association between mutational status and demographic and clinicopathological characteristics.
| Variable | Category | Mutation status | P-value | |
|---|---|---|---|---|
| KRAS | Wild type | |||
| n (%) | n (%) | |||
| Gender | Male | 74 (50.7%) | 72 (49.3%) | 0.404 |
| Female | 49 (56.3%) | 38 (43.7%) | ||
| Age, years | <50 | 18 (46.2%) | 21 (53.8%) | 0.455 |
| 51–60 | 35 (54.7%) | 29 (45.3%) | ||
| 61–70 | 35 (60.3%) | 23 (39.7%) | ||
| ≥71 | 35 (48.6%) | 37 (51.4%) | ||
| T stage | T1 | 1 (33.3%) | 2 (66.7%) | 0.725 |
| T2 | 14 (45.2%) | 17 (54.8%) | ||
| T3 | 64 (53.3%) | 56 (46.7%) | ||
| T4 | 28 (52.8%) | 25 (47.2%) | ||
| Undocumented | 16 (61.5%) | 10 (38.5%) | ||
| N stage | N0 | 37 (54.4%) | 31 (45.6%) | 0.533 |
| N1 | 46 (52.9%) | 41 (47.1%) | ||
| N2 | 21 (44.7%) | 26 (55.3%) | ||
| X | 1 (33.3%) | 2 (66.7%) | ||
| Undocumented | 18 (64.3%) | 10 (35.7%) | ||
| M stage | M0 | 29 (43.9%) | 37 (56.1%) | 0.092 |
| M1 | 35 (53.8%) | 30 (46.2%) | ||
| MX | 42 (64.6%) | 23 (35.4%) | ||
| Undocumented | 17 (45.9%) | 20 (54.1%) | ||
| Location | Right colon | 40 (66.7%) | 20 (33.3%) | 0.147 |
| Left colon | 24 (46.2%) | 28 (53.8%) | ||
| Rectum | 28 (45.2%) | 34 (54.8%) | ||
| Colon and rectum | 27 (54%) | 23 (46%) | ||
| Anus | 1 (33.3%) | 2 (66.7%) | ||
| Small intestine | 2 (40%) | 3 (60%) | ||
| Anorectal | 1 (100%) | 0 (0%) | ||
| Prognosis | Response to treatment | 53 (49.5%) | 54 (50.5%) | 0.509 |
| No response to treatment | 33 (52.4%) | 30 (47.6%) | ||