A new scoring system to evaluate adjuvant chemotherapy for patients with T2N0M0 gastric cancer after D2 gastrectomy

Table 2 Univariate Cox Proportional Hazards Modeling for overall survival

Clinicopathological features	HR (95%CI)	P value
Sex
Male	Reference
Female	0.278 (0.066-1.172)	P = 0.081
Smoking history
Yes	Reference
No	0.605 (0.276-1.323)	P = 0.208
Family history of gastric cancer
Yes	Reference
No	0.550 (0.075-4.057)	P = 0.558
BMI
18.5-23.9	Reference
> 23.9 or < 18.5	2.509 (1.060-5.937)	P = 0.036
Postoperative hospital stay
≤ 14 d	Reference
> 14 d	0.990 (0.298-3.292)	P = 0.987
Tumor site
Cardia cancer	Reference
Non-cardia gastric cancer	0.411 (0.192-0.878)	P = 0.022
The degree of differentiation
Poorly differentiated	Reference
Moderately differentiated	1.330 (0.574-3.082)	P = 0.507
Highly differentiated	0.857 (0.182-4.043)	P = 0.846
Vascular invasion
Yes	Reference
No	0.097 (0.044-0.212)	P < 0.001

BMI: Body mass index; HR: Hazard ratio; 95%CI: 95% confidence interval.