Table 6.

Correlation of supine and sitting measurements of optic nerve head parameters, assessed using concordance correlation coefficients.

Group	Disc area	Cup area	Rim area	Rim volume
Younger healthy	0.97 (0.94–0.99)	0.99 (0.99–1.00)	0.98 (0.97–0.99)	0.98 (0.96–0.99)
Older healthy	0.98 (0.96–0.99)	0.99 (0.98–0.99)	0.98 (0.97–0.99)	0.99 (0.98–0.99)
Glaucoma	0.96 (0.94–0.99)	0.98 (0.96–0.99)	0.84 (0.71–0.97)	0.92 (0.85–0.99)
Overall	0.98 (0.97–0.99)	0.99 (0.99–1.00)	0.98 (0.96–0.99)	0.99 (0.98–0.99)

Values represent the mean and 95% confidence interval.