Table 2:

Overview of different distance measurements

Location	Normal Distribution (+/−)	Group 1 Fam + HCI +		Group 3 Controls Matched with Group 1		Group 2 Fam + HCI −		Group 4 Controls Matched with Group 2
		Mean (mm)	SD	Mean (mm)	SD	Mean (mm)	SD	Mean (mm)	SD
Frontal total	+	11.2b	3.2	5.9b	1.4	5.6	1.4	5.5	1.8
Frontal inner table	−	3.2b	1.8	1.2b	0.7	1.5c	0.4	1.1c	0.4
Frontal outer table	+	2.0b	0.5	1.1b	0.3	1.6d	0.4	1.1d	0.5
Parietal total	−	9.4b	3.7	2.2b	1.1	2.8	0.7	2.4	1.1
Parietal inner table	+	1.7	1.0	1.1	0.4	1.5	0.4	0.8	0.4
Parietal outer table	+	1.9a	0.6	1.0a	0.4	1.4	0.5	1.2	0.7
Occipital total	+	7.6b	2.1	4.9b	1.5	5.6	1.2	5.0	2.0
Occipital inner table	+	1.9a	0.9	0.9a	0.2	1.2c	0.3	0.9c	0.3
Occipital outer table	+	2.4	0.8	2.0	0.5	1.7	0.5	1.6	0.6
Frontal skull base	−	2.9b	2.0	0.8b	0.1	1.6d	0.6	0.8d	0.2
Middle skull base	−	4.3b	1.9	0.7b	0.1	1.3d	0.4	0.6d	0.1
Foramen magnum	+	1.9b	0.3	1.3b	0.4	1.8d	0.4	1.2d	0.2
Clivus inner table	+	1.1	0.4	0.8	0.2	1.2d	0.3	0.8d	0.3
Porus IAC	−	1.1b	0.4	4.1b	0.6	4.0	0.7	4.3	0.8
Fundus IAC	+	2.8b	1.1	5.3b	1.0	5.1	0.5	5.1	0.7
Optic canal	+	3.7	1.6	4.2	0.8	4.1	0.5	4.0	0.8
Vidian canal	+	1.0	0.5	0.9	0.3	1.2	0.4	1.0	0.3
Coronoid suture	+	4.6a	1.2	3.0a	0.9	2.7	1.7	4.0	1.5
Lambdoid suture	+	7.0b	2.4	4.0b	1.4	3.9	1.5	4.5	1.6

Note:—Fam indicates family member.

^aPaired t test 1–3, P ≤ 0.05.

^bPaired t test 2–4, P ≤ 0.05.

^cPaired t test 2–4, P ≤ 0.005.

^dPaired t test 2–4, P ≤ 0.005.