. Author manuscript; available in PMC: 2013 Oct 23.

Published in final edited form as: Am J Ophthalmol. 2012 Jul 19;154(4):712–721.e1. doi: 10.1016/j.ajo.2012.03.049

Table 4.

Summary statistics of optic nerve head measurements.

Group	Position	Disc area (μm²)	Cup area (μm²)	Rim area (μm²)	Rim volume (μm³)
Younger healthy
OD	Supine	1.85 (0.40)	0.54 (0.46)	1.31 (0.34)	0.25 (0.15)
	Sitting	1.87 (0.41)	0.54 (0.45)	1.34 (0.32)	0.27 (0.16)
	P	0.92	0.99	0.88	0.86
OS	Supine	1.90 (0.50)	0.53 (0.60)	1.38 (0.34)	0.29 (0.15)
	Sitting	1.89 (0.51)	0.53 (0.61)	1.36 (0.35)	0.29 (0.15)
	P	0.95	0.99	0.97	0.98
Older healthy
OD	Supine	1.98 (0.35)	0.73 (0.44)	1.25 (0.45)	0.20 (0.12)
	Sitting	1.97 (0.36)	0.74 (0.47)	1.24 (0.42)	0.20 (0.12)
	P	0.99	0.97	0.95	0.97
OS	Supine	1.91 (0.40)	0.73 (0.46)	1.18 (0.27)	0.19 (0.09)
	Sitting	1.92 (0.36)	0.71 (0.46)	1.21 (0.22)	0.20 (0.10)
	P	0.98	0.96	0.96	0.98
Glaucoma
OD	Supine	1.61 (0.86)	1.07 (0.58)	0.55 (0.29)	0.05 (0.03)
	Sitting	2.10 (0.42)	1.41 (0.51)	0.69 (0.15)	0.06 (0.03)
	P	0.12	0.18	0.18	0.22
OS	Supine	1.95 (0.40)	1.14 (0.49)	0.81 (0.18)	0.08 (0.04)
	Sitting	1.98 (0.40)	1.11 (0.50)	0.87 (0.18)	0.09 (0.03)
	P	0.89	0.89	0.48	0.71

Values represent the mean and standard deviation.