Table 1 Clinico-pathological characteristics of all patients, their tumours and the relationship of each variable with overall survival
Characteristic | Number patients | Percentage | Relationship with survival |
Sex | |||
Male | 340 | 52.3 | χ2=0.027, P=0.870 |
Female | 310 | 47.7 | |
Age (years) | |||
<70 | 305 | 46.9 | χ2=29.213, P <0.001 |
⩾70 | 345 | 53.1 | |
Screen detected | |||
Yes | 52 | 8 | χ2=16.381, P <0.001 |
No | 598 | 92 | |
Tumour site | |||
Proximal colon | 261 | 40.2 | Proximal vs distal, χ2=8.418, P =0.004 |
Distal colon | 245 | 37.7 | Distal vs rectal, χ2=0.906, P=0.341 |
Rectum | 144 | 22.2 | Colon vs rectum, χ2=0.098, P=0.754 |
Tumour differentiation | |||
Well/moderate | 600 | 92.3 | χ2=0.976, P=0.323 |
Poor | 50 | 7.7 | |
Extra-mural venous invasion | |||
Present | 140 | 21.5 | χ2=100.946, P <0.001 |
Absent | 510 | 78.5 | |
Microsatellite instability status | |||
Defective | 96 | 15.2 | χ2=2.848, P=0.091 |
Intact | 536 | 84.8 | |
pT stage | |||
T1 | 30 | 4.6 | T1 vs T2, χ2=0.382, P=0.536 |
T2 | 114 | 17.5 | T2 vs T3, χ2=24.739, P <0.001 |
T3 | 411 | 63.2 | T3 vs T4, χ2=30.159, P <0.001 |
T4 | 95 | 14.6 | |
pN stage | |||
N0 | 364 | 56 | N0 vs N1, χ2=54.071, P <0.001 |
N1 | 177 | 27.2 | N1 vs N2, χ2=17.636, P <0.001 |
N2 | 109 | 16.8 | |
Dukes stage | |||
A | 120 | 18.5 | A vs B, χ2=5.059, P =0.025 |
B | 244 | 37.5 | B vs C, χ2=65.510, P <0.001 |
C | 286 | 44 | |
