Table 3.

Multivariate logistic regression analysis of risk of delayed postoperative hyponatremia.

Factors	Odds ratio	95% CI	P-value
Craniocaudal dimension	1.128	1.009, 1.261	0.034
Transverse dimension	1.111	0.958, 1.288	0.164
Tumor volume	1.000	1.000, 1.000	0.070
Preoperative hyperprolactinemia	2.618	1.020, 6.720	0.045
Preoperative the pituitary stalk deviation angle	3.033	1.176, 7.818	0.022
Preoperative FT3	0.743	0.409, 1.349	0.329
Preoperative FT4	0.864	0.739, 1.011	0.068

FT3, Free triiodothyronine; FT4, free thyroxine.