Table 2.

Univariate and multivariate Cox regression analyses of clinicopathological features associated with OS of patients with PDAC

	Univariate		Multivariate
	HR (95% CI)	P	HR (95% CI)	P
TNM stage II vs. I	1.913 (1.014–3.609)	0.045	2.215 (1.164–4.213)	0.015
S1 (courses) 4 vs. > 4	2.248 (1.178–4.291)	0.014	3.113 (1.531–6.327)	0.002
Grade G3 vs. G1/2	3.419 (1.713–6.823)	< 0.001	3.887 (1.922–7.861)	< 0.001

Abbreviations: CI Confidence interval, HR Hazard ratio, TNM Tumor–node–metastasis