Table 1. Patient clinicopathological characteristics and their association with overall survival and disease free survival using Kaplan-Meier analysis and log-rank Chi-squared test in 70 metastatic colorectal cancer patients.

Characteristics	N	OS in years (mean ± SE)	95% CI	P-value (χ2-test)	DFS in months (mean ± SE)	95% CI	P-value (χ2-test)
Age in years
≤70	19	5.478 ± 0.527	4.446–6.511	NS	58.737 ± 8.250	42.567–74.907	NS
>70	51	5.785 ± 0.361	5.078–6.492		81.460 ± 6.288	69.136–93.785
Gender
Male	40	5.930 ± 0.415	5.117–6.743	NS	78.636 ± 7.630	63.682–93.590	NS
Female	30	5.476 ± 0.450	4.593–6.359		75.558 ± 8.212	59.464–91.653
Tumour Site
Right colon	35	5.600 ± 0.449	4.720–6.480	NS	78.968 ± 8.184	62.927–95.008	NS
Left colon	35	5.843 ± 0.419	5.022–6.663		77.017 ± 7.269	62.770–91.265
T stage
T4	18	5.477 ± 0.695	4.116–6.839	NS	71.000 ± 9.247	52.876–89.124	NS
<T4	52	5.783 ± 0.342	5.113–6.453		76.092 ± 6.519	63.315–88.868
N stage
N2	41	3.971 ± 0.308	3.368–4.574	0.004	36.489 ± 4.702	27.273–45.706	0.0003
<N2	19	6.047 ± 0.329	5.401–6.693		88.842 ± 5.839	77.397–100.286
M stage
M0	62	5.832 ± 0.315	5.214–6.450	NS	79.917 ± 5.951	68.252–91.581	NS
M1	8	4.208 ± 0.601	3.031–5.386		45.429 ± 6.432	32.822–58.035
LVI
Absent	48	5.949 ± 0.349	5.265–6.632	NS	82.441 ± 6.933	68.851–96.030	NS
Present	22	5.142 ± 0.568	4.029–6.255		57.516 ± 6.191	45.381–69.650
Grade
G3	41	5.869 ± 0.464	4.960–6.779	NS	74.818 ± 7.324	60.463–89.173	NS
<G3	29	5.592 ± 0.408	4.792–6.392		79.061 ± 8.776	61.860–96.262
Chemotherapy
No	17	5.250 ± 0.618	4.040–6.460	NS	58.063 ± 8.071	42.244–73.881	NS
Yes	43	6.012 ± 0.450	5.257–6.766		80.511 ± 6.888	67.010–94.011