Morphometric analysis of posterior cranial fossa and foramen magnum and it’s clinical implications in craniovertebral junction malformations: a computed tomography based institutional study in a tertiary care hospital of northern part of India

Egyptian Journal of Neurosurgery

Table 10 : Comparison of Angular Craniometric Parameters of Posterior Cranial Fossa, Foramen Magnum and surrounding territory in different age groups

Angular Craniometric Parameters	18–30(n = 21) Mean ± SD	31–40(n = 37) Mean ± SD	41–50(n = 20) Mean ± SD	51–60 (n = 27) Mean ± SD	61–70 (n = 15) Mean ± SD	Total Mea± SD	p value
Basal angle (°)	125.66 ± 3.14	125.88 ± 4.5	125.14 ± 4.37	127.03 ± 5.49	125.42 ± 3.72	125.92 ± 4.41	0.633^a
Boogard angle (°)	137.4 ± 4.34	137.54 ± 3.43	135.12 ± 2.43	137 ± 2.84	136.74 ± 3.44	136.89 ± 3.39	0.118^a
NBO angle (°)	169.31 ± 2.38	169.39 ± 2.09	169.75 ± 1.24	169.45 ± 2.08	169.03 ± 2.1	169.4 ± 2.01	0.884^a
Foramen Magnum angle (°)	12.5 ± 1.13	12.5 ± 1.54	13.57 ± 2.25	13.2 ± 1.99	12.87 ± 1.47	12.88 ± 1.74	0.148^a
Clivo-odontoid angle (°)	147.17 ± 7.72	143.98 ± 9.23	150.5 ± 4.97	142.19 ± 11	146.84 ± 4.86	145.58 ± 8.78	0.012^a
Clivo palatal angle (°)	59.83 ± 5.82	59.48 ± 5.32	60.76 ± 5.36	59.82 ± 6.35	61.59 ± 6.5	60.1 ± 5.76	0.778^a
Clivus canal angle (°)	162.72 ± 7.85	159.95 ± 9.74	165.62 ± 5.11	157.83 ± 11.39	162.23 ± 5.65	161.19 ± 9.07	0.038^a
Clivus supraocciput angle (°)	77.82 ± 5.71	77.31 ± 3.76	76.86 ± 4.65	78.66 ± 4.07	77.09 ± 5.23	77.6 ± 4.52	0.671^a
Tentorial slope (°)	87.09 ± 5.94	88.42 ± 5.44	90.36 ± 6.07	87.81 ± 6.5	89.43 ± 5.26	88.5 ± 5.87	0.416^a
Tentorial twinning line angle (°)	34.24 ± 2.25	33.69 ± 2.47	34.54 ± 1.66	34.21 ± 2.07	34.06 ± 1.68	34.09 ± 2.12	0.666^a