Lymph node dissection does not affect the survival of patients with tumor node metastasis stages I and II colorectal cancer

Table 3 Cox regression analysis of overall survival of T2 patients with colorectal cancer

Risk factors	Univariate analysis		Multivariate analysis
	HR (95%CI)	P value	HR (95%CI)	P value
Age (years)	1.073 (1.040-1.107)	< 0.01a	1.064 (1.032-1.098)	< 0.01a
Sex (male/female)	0.718 (0.374-1.376)	0.318
BMI (kg/m2)	0.947 (0.856-1.047)	0.290
T2DM (yes/no)	2.309 (1.015-5.251)	0.046a	1.966 (0.862-4.485)	0.108
Tumor location (colon/rectum)	1.058 (0.514-2.178)	0.879
Surgical history (yes/no)	0.805 (0.369-1.757)	0.586
Smoking (yes/no)	1.008 (0.516-1.971)	0.981
Drinking (yes/no)	0.836 (0.383-1.825)	0.653
Hypertension (yes/no)	1.405 (0.708-2.791)	0.331
Tumor size (≥ 5 cm/< 5 cm)	0.892 (0.392-2.027)	0.785
Lymph nodes	0.946 (0.893-1.002)	0.057
Overall complications (yes/no)	2.833 (1.498-5.355)	< 0.01a	2.297 (1.200-4.397)	0.012a

^aP < 0.05.

HR: Hazard ratio; CI: Confidence interval; BMI: Body mass index; T2DM: Type 2 diabetes mellitus.