Table 1.

Comparison of general data between the two groups.

Group	Gender		Age (years)	Tumor site		Clinical stages		Tumor diameter (cm)
	Male	Female		Carcinoma of colon	Rectal cancer	T3	T4
Control group (n = 41)	26	15	49.38 ± 8.76	25	16	31	10	3.49 ± 0.58
Observation group (n = 41)	22	19	49.66 ± 8.43	20	21	27	14	3.54 ± 0.61
t/χ2	0.804		0.147	1.231		0.943		0.380
P	0.369		0.883	0.267		0.332		0.705