Table 3.

Multivariate analysis of overall survival including lactate dehydrogenase, carbohydrate antigen 19-9, and serum sodium levels before surgery, age (≥ 65 vs. < 65 years), and sex

Parameter	p	Odds ratio	95% Confidence interval
LDH	0.03295	0.2861	0.0911–0.8983
Ca19-9	0.00147	0.1704	0.0576–0.5043
Age  ≥ 65 years	0.2451	1.7006	0.6977–4.1450
Gender	0.6020	0.7697	0.2893–2.0480
Preoperative sodium level	0.0200	0.7697	0.5893–0.9480