Table 6.

Multivariate analysis of patients with perioperative blood transfusion by Cox model

Variable	Wald	P value	RR	95% CI
Gender	0.839	0.360	0.859	0.621–1.189
Age	0.690	0.406	1.138	0.839–1.545
Tumor location	0.942	0.332	0.929	0.801–1.078
TNM stage	59.565	< 0.001	3.268	2.419–4.415

TNM Tumor Node Metastasis, P value obtained by chi-squares tests or Fisher’s exact test, RR relative risk, CI confidence interval