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 7 Comparison of Linear Craniometric Parameters of Foramen magnum in different age groups

Linear Craniometric Parameters of Foramen Magnum	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 Mean ± SD	p value
Foramen Magnum transverse diameter (mm)	27.03 ± 1.27	27.08 ± 1.63	27.24 ± 1.24	27.59 ± 1.5	26.36 ± 0.78	27.12 ± 1.42	0.111^a
Foramen Magnum anteroposterior diameter (mm)	31.33 ± 2.45	30.79 ± 2.27	30.97 ± 1.91	31.62 ± 2.27	29.88 ± 1.86	30.99 ± 2.23	0.152^a
Foramen Magnum area (mm²)	687.21 ± 35.4	687.19 ± 29.02	698.4 ± 24.11	700.54 ± 32.81	681.21 ± 25.87	691.32 ± 30.35	0.176^a