Table 2. Postoperative outcomes of the patients.

	Patients with postoperative hyponatremia (%)	Patients without postoperative hyponatremia (%)	p-value
Total resection number/total number of the patients*	83/93 (89.2)	1,096/1,246 (87.8)	0.712
Tumor removal fashion (piecemeal:capsulectomy)*	55:38	796:444	0.328
Postoperative hypopituitarism/total patients evaluated by CPFT†	44/89 (49.4)	582/1,212 (48.0)	0.796
Subnormal response in ACTH axis/total patients evaluated by CPFT†	30/89 (33.7)	284/1,212 (23.4)	0.029‡
Worsened pituitary function/total patients evaluated by CPFT†	9/85 (10.6)	80/1,159 (6.9)	0.203

^*Number of patients after excluding any patients with missing data, ^†Number of patients who were evaluated by combined pituitary function test for their pituitary function, ^‡p<0.05. ACTH, adrenocorticotropin hormone; CPFT, combined pituitary function test