Table 5 Univariate analysis of categorical variables using chi-square and Fisher’s exact tests: association between factors when postoperative volume difference (O2 − A2) ≥1 SE (1.40 mL) and preoperative volume difference (O1 − A1) <1 SE (1.54 mL).

From: Different Volumetric Measurement Methods for Pituitary Adenomas and Their Crucial Clinical Significance

Characteristics

Postoperative volume difference (O2 − A2) ≥1 SE and preoperative difference (O1 − A1) <1 SE, n (%)

No

Yes

P value

Extent of resection

  

0.0061

 Gross total

51(96.2)

2(3.8)

 Subtotal

40(78.4)

11(21.6)

High grade cavernous sinus invasion

  

0.3353 *

 No

29(93.6)

2(6.4)

 Yes

62(84.9)

11(15.1)

Suprasellar extension

  

0.6860 *

 No

15(93.8)

1(6.2)

 Yes

76(86.4)

12(13.6)

Preoperative shape

  

0.9999 *

 Irregular

19(86.4)

3(13.6)

 Regular

72(87.8)

10(12.2)

Postoperative shape

  

0.6865 *

 Irregular

77(86.5)

12(13.5)

 Regular

14(93.3)

1(6.7)

Apoplexy

  

0.8821

 No

44(88.0)

6(12.0)

 Yes

47(87.0)

7(13.0)

  1. *Fisher’s exact test.