Table 2 Univariable and multivariable logistic regression analyses based on the imputed datasets for the final model

Age (year)

0.02

1.02

0.147

Gender

 Female

Reference

 Male

 − 0.14

0.87

0.646

Clinical subtype

 Nonfunctioning

Reference

 PRL secreting

0.83

2.28

0.160

 GH secreting

 − 0.05

0.95

0.898

 ACTH secreting

 − 0.30

0.74

0.716

 PRL-GH secreting

 − 0.22

0.80

0.852

Preoperative hyponatremia

 No

Reference

 Yes

0.21

1.23

0.749

Hyponatremia on POD 1–2

 No

Reference

 Yes

0.75

2.11

0.088^*

0.97

2.64

0.033^**

Polyuria

 No

Reference

 Yes

0.25

1.28

0.489

Visual impairment

 No

Reference

 Yes

0.68

1.97

0.028^**

Hardy grade for suprasellar extension

 0

Reference

 A

 − 0.71

0.49

0.160

 B

 − 0.08

0.92

0.842

 C

0.57

1.76

0.175

 D

0.98

2.67

0.348

 E

1.39

4.01

0.150

Hardy grade for sellar invasion

 Noninvasive

Reference

 Invasive

0.41

1.51

0.204

Knosp grade

 Noninvasive

Reference

 Invasive

0.42

1.52

0.200

Tumor shape 1

 In sella

Reference

 Ellipsoid

 − 0.49

0.62

0.328

 Hourglass sign

0.25

1.29

0.517

Tumor shape 2

 Not lobulated

Reference

 Lobulated

0.45

1.58

0.355

Log₁₀ (FSH) (IU/L)

0.84

2.32

0.020^**

FT3 (pmol/L)

 − 0.54

0.58

0.012^**

WBC count (10⁹/L)

 − 0.30

0.74

0.012^**

Monocyte percentage (%)

0.20

1.22

0.032^**

0.20

1.22

0.047^**

PT (s)

0.57

1.76

0.006^**

0.58

1.78

0.008^**

INR

5.42

226.26

0.017^**

Total bilirubin (μmol/L)

 − 0.05

0.95

0.082^*

Chlorine (mmol/L)

0.06

1.06

0.277