Radiographic Analysis of Morphological Variations of Sella Turcica in Different Skeletal Patterns Among Saudi Subpopulations

Figures & data

Figure 1 Flow chart of study participants.

Figure 2 Normal sella turcica morphology and reference lines used for measuring sella size.

Table 1 Distribution of Patients According to Age, Gender, and Skeletal Classes

Skeletal Class	Females		Males		Total
	9–14 years	15–26 years	9–14 years	15–26 years
Class I	16	26	32	27	101
Class II	38	28	47	27	140
Class III	15	26	15	3	59
Total	69	80	94	57	300

Table 2 Linear Dimensions of Sella (in Millimetres) According to Age Group

Linear Dimension	Age Group (Years)	n	Mean	SD	Standard Error of the Mean	P-value
Length	9–14	163	9.76	0.99	0.07	<0.001, S
	15–26	137	13.40	6.35	0.54
Depth	9–14	163	7.85	1.65	0.13	<0.001, S
	15–26	137	11.26	7.09	0.60
Diameter	9–14	160	9.68	1.59	0.12	<0.001, S
	15–26	137	13.39	8.43	0.72

Abbreviations: SD, Standard deviation; S, Statistically significant.

Table 3 Linear Dimensions of Sella Turcica (in Millimetres) for Females and Males

Linear Dimension	Gender	n	Mean	SD	Standard Error of the Mean	P-value
Length	Female	149	13.03	6.28	0.51	<0.001, S
	Male	151	10.13	1.21	0.09
Depth	Female	149	10.85	6.95	0.56	<0.001, S
	Male	151	8.26	1.90	0.15
Diameter	Female	149	12.93	8.27	0.67	<0.001, S
	Male	148	10.14	1.74	0.14

Abbreviations: n, Number of participants; SD, Standard deviation; S, Statistically significant.

Table 4 One-Way ANOVA Testing the Effects of Skeletal Class on Sella Linear Dimensions (in Millimetres)

Linear Dimension	Skeletal Class	n	Mean	SD	Standard Error of the Mean	95% Confidence Interval for Mean		Minimum	Maximum	P-value
						Lower Bound	Upper Bound
Length	Class I	101	10.20	1.30	0.12	9.94	10.46	7.6	16.7	<0.001, S
	Class II	140	11.04	3.96	0.33	10.37	11.70	7.6	44.5
	Class III	59	15.19	7.58	0.98	13.21	17.16	9.3	44.5
	Total	300	11.57	4.73	0.27	11.03	12.11	7.6	44.5
Depth	Class I	101	8.68	2.06	0.20	8.27	9.09	4.6	16.0	<0.001, S
	Class II	140	8.95	4.49	0.38	8.20	9.70	4.6	46.7
	Class III	59	12.43	8.65	1.12	10.17	14.68	5.8	46.7
	Total	300	9.54	5.23	0.30	8.95	10.14	4.6	46.7
Diameter	Class I	101	9.99	1.85	0.18	9.63	10.36	5.9	15.4	<0.001, S
	Class II	140	11.14	5.21	0.44	10.26	12.02	6.4	56.8
	Class III	59	15.11	10.25	1.33	12.44	17.78	8.2	56.8
	Total	300	11.54	6.13	0.35	10.84	12.24	5.9	56.8

Abbreviations: n, Number of participants; SD, Standard deviation; S, Statistically significant.

Table 5 Post Hoc Pairwise Comparison (Scheffe Test) Between Classes for Length, Depth & Diameter (in Millimetres) as the Dependent Variables

Linear Dimension	Skeletal Class	I	II	III
Length	I	–	0.35	<0.001, S
	II	0.35	–	<0.001, S
	III	<0.001, S	<0.001, S	–
Depth	I	–	0.92	<0.001, S
	II	0.92	–	<0.001, S
	III	<0.001, S	<0.001, S	–
Diameter	I	–	0.33	<0.001, S
	II	0.33	–	<0.001, S
	III	<0.001, S	<0.001, S	–

Abbreviation: S, Statistically significant.

Table 6 Regression Analysis for Variables (Age Group, Gender, and Skeletal Type) and Linear Dimensions

Variable	Length			Depth			Diameter
	B	Standard Error	Significance	B	Standard Error	Significance	B	Standard Error	Significance
Age group	0.917	0.05	<0.001, S	0.846	0.07	<0.001, S	1.017	0.08	<0.001, S
Gender	−0.901	0.37	0.01, S	−0.871	0.50	0.087	−0.660	0.58	0.258
Skeletal type	1.526	0.25	<0.001, S	0.965	0.34	<0.001, S	1.572	0.39	<0.001, S
R^2	0.572			0.368			0.396

Abbreviations: B, Regression coefficient; S, Statistically significant.

Table 7 Frequency Distribution of Different Shapes of Sella Turcica Among Both Genders and in Two Age Groups

Sella Shape	Gender				Age
	Males		Females		9–14 Years		15–26 Years
	Frequency	Percentage	Frequency	Percentage	Frequency	Percentage	Frequency	Percentage
Normal	68	45.6	65	43.0	84	51.5	49	35.7
Oblique anterior wall	28	18.8	38	25.2	29	17.8	37	27.0
Sella turcica bridge	07	4.7	04	2.6	04	2.5	07	5.1
Double contour of the floor	27	18.2	25	16.6	26	16.0	26	19.0
Pyramidal shape	16	10.7	19	12.6	20	12.2	15	11.0
Irregular dorsum sella	03	2.0	00	0.0	00	0.0	03	2.2
Total	149	100	151	100	163	100	137	100

Table 8 Frequency Distribution of Different Shapes of Sella Turcica in Skeletal Classes

Sella Shape	Class I		Class II		Class III		Total
	Frequency	Percentage	Frequency	Percentage	Frequency	Percentage	Frequency	Percentage
Normal	51	50.5	61	43.6	21	35.6	133	44.3
Oblique anterior wall	23	22.7	26	18.6	17	28.8	66	22.0
Sella turcica bridge	04	4.0	05	3.5	02	3.4	11	3.7
Double contour	13	12.8	28	20.0	11	18.6	52	17.3
Pyramidal shape	10	10.0	18	12.9	07	11.9	35	11.7
Irregular dorsum sella	00	0.0	02	1.4	01	1.7	03	1.0
Total	101	100	140	100	59	100	300	100