. Author manuscript; available in PMC: 2016 Jan 31.

Published in final edited form as: Clin Radiol. 2014 Nov 27;70(2):146–152. doi: 10.1016/j.crad.2014.10.009

Table 3.

Measurements of L1–L5 (average) for anterior-posterior (AP) dural sac diameter (DSD) and transverse (TR) DSD, AP-vertebral body diameter (VBD), and calculated dural sac ratio (DSR) in controls and Marfan patients (reader 1).

		Control (n = 72) Female = 35 Male = 37	Marfan (n = 24) Female = 10 Male = 14	p-Value
AP-DSD (cm)	Female & male	1.38 + 0.15	1.61 + 0.17	5.9 × 10⁻⁹
TR-DSD (cm)	Female & male	1.89 + 0.17	2.22 + 0.32	6.5 × 10⁻⁹
AP-VBD (cm)	Female	2.78 + 0.21	2.91 + 0.19
	Male	3.11 + 0.23	3.14 + 0.25
DSR (AP-DSD/AP-VBD)	Female	0.51 + 0.08	0.56 + 0.06	0.07
	Male	0.44 + 0.05	0.51 + 0.06	8.2 × 10⁻⁵

Data are means + standard deviation.