Table 2.

Univariate associations with survival

Factor	Overall patients			Matched patients
	P-value	HR	95% CI	P-value	HR	95% CI
Blood transfusion (yes vs no)	0.027	1.18	1.02–1.37	<0.001	1.40	1.17–1.67
Cancer stage (lower vs higher)	<0.001	0.64	0.57–0.72	<0.001	0.74	0.64–0.86
Degree of differentiation (lower vs higher)	<0.001	1.20	1.07–1.35	<0.001	1.28	1.11–1.47
Chemotherapy (yes vs no)	0.062	0.90	0.80–1.01	0.191	0.91	0.79–1.05
Group (TIVA vs INHA)	<0.001	0.63	0.56–0.70	<0.001	0.67	0.58–0.77
Age (<60 years vs ≥60 years)	0.883	0.99	0.88–1.11	0.858	1.01	0.88–1.17

Abbreviations: CI, confidence interval; HR, hazard ratio; INHA, inhalational anesthesia; TIVA, total intravenous anesthesia.