. 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 2.

Repeatability (intraclass correlation coefficients) of optic nerve head measurements in each body position and by subject group.

Group	Position	Disc area (μm²)	Cup area (μm²)	Rim area (μm²)	Rim volume (μm³)
Younger healthy
OD
	Supine	0.96 (0.92–0.99)	0.98 (0.97–0.99)	0.95 (0.92–0.99)	0.97 (0.95–0.99)
	Sitting	0.97 (0.94–0.99)	0.98 (0.96–0.99)	0.93 (0.87–0.99)	0.88 (0.78–0.98)
OS
	Supine	0.96 (0.95–0.99)	0.99 (0.99–1.0)	0.94 (0.89–0.99)	0.86 (0.74–0.98)
	Sitting	0.98 (0.96–1.0)	0.99 (0.99–1.0)	0.95 (0.91–0.99)	0.96 (0.95–1.0)
Older healthy
OD
	Supine	0.93 (0.88–0.99)	0.98 (0.97–1.0)	0.96 (0.91–1.0)	0.97 (0.94–0.99)
	Sitting	0.97 (0.93–0.99)	0.98 (0.97–1.0)	0.95 (0.91–0.99)	0.97 (0.93–0.99)
OS
	Supine	0.93 (0.86–0.99)	0.98 (0.96–0.99)	0.89 (0.79–0.98)	0.95 (0.91–0.99)
	Sitting	0.90 (0.81–0.99)	0.99 (0.97–1.0)	0.77 (0.59–0.95)	0.94 (0.88–0.99)
Glaucoma
OD
	Supine	0.84 (0.69–0.98)	0.96 (0.92–1.0)	0.75 (0.55–0.96)	0.84 (0.70–0.98)
	Sitting	0.93 (0.86–0.99)	0.98 (0.96–1.0)	0.73(0.51–0.95)	0.81 (0.64–0.97)
OS
	Supine	0.94 (0.88–0.99)	0.97 (0.93–1.0)	0.82 (0.66–0.98)	0.89 (0.79–0.99)
	Sitting	0.98 (0.96–1.0)	0.97 (0.93–1.0)	0.82 (0.66–0.98)	0.90 (0.80–0.99)

Values represent the mean and 95% confidence interval.