Table 5 Genotype frequency distribution and comparison between degree of calcification

Normal sella turcica

1 (2.9)

13 (38.2)

20 (58.9)

Reference

25 (75.8)

6 (18.2)

2 (6.0)

Reference

14 (41.2)

11 (32.3)

9 (26.5)

Reference

ST bridge type B

2 (5.1)

16 (41.0)

21 (53.9)

0.849

0.621

26 (68.4)

10 (26.3)

2 (5.3)

0.715

0.677

17 (42.5)

18 (45.0)

5 (12.5)

0.265

0.340

ST bridge type A

0 (0.0)

4 (25.0)

12 (75.5)

0.478

0.290

18 (100)

0

(0.0)

0 (0.0)

0.075

0.013*

3 (17.6)

13 (76.5)

1 (5.9)

0.011*

0.887

Incomplete bridge

0 (0.0)

6 (66.7)

3 (33.3)

0.296

0.198

6 (66.7)

3 (33.3)

0 (0.0)

0.501

0.482

3 (30.0)

4 (40.0)

3 (30.0)

0.811

0.892

Hypertrophic posterior clinoid process

1 (3.5)

3 (10.3)

25 (86.2)

0.039*

0.050*

22 (78.6)

5 (17.9)

1 (3.6)

0.891

0.782

10 (34.5)

16 (55.2)

3 (10.3)

0.121

0.318

Hypotropic posterior clinoid process

0 (0.0)

1 (100)

0 (0.0)

0.462

0.562

1 (100)

0

(0.0)

0 (0.0)

0.853

0.872

0 (0.0)

0

(0.0)

1 (100)

0.271

0.922

Irregularity in the posterior part of the ST

1 (20.0)

1 (20.0)

3 (60.0)

0.237

0.872

3 (100)

0 (0.0)

0 (0.0)

0.839

0.792

0 (0.0)

2 (66.7)

1 (33.3)

0.331

0.832

Pyramidal shape of the dorsum sella

0 (0.0)

2 (100)

0 (0.0)

0.227

0.235

0 (0.0)

2 (100)

0 (0.0)

0.028

0.133

1 (50.0)

1 (50.0)

0 (0.0)

0.592

0.899

Double contour of the floor

0 (0.0)

1 (100)

0 (0.0)

0.462

0.562

1 (100)

0 (0.0)

0 (0.0)

0.853

0.872

1 (100)

0 (0.0)

0 (0.0)

0.503

0.628

Oblique anterior wall

0 (0.0)

1 (12.5)

7 (87.5)

0.308

0.285

7 (100)

0 (0.0)

0 (0.0)

0.346

0.588

2 (25.0)

5 (62.5)

1 (12.5)

0.285

0.632

Oblique contour of the floor

0 (0.0)

2 (50.0)

2 (50.0)

0.509

0.289

2 (66.7)

1 (33.3)

0 (0.0)

0.792

0.690

2 (50.0)

2 (50.0)

0

(0.0)

0.484

0.559