. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: Am J Ophthalmol. 2013 Aug 20;156(5):918–926.e2. doi: 10.1016/j.ajo.2013.06.017

Table 1.

Demographic and Clinical Characteristics of the Glaucoma and Control Groups Included in the Study

Characteristic	Glaucoma (n = 262)	Control (n = 190)	P Value
Age, y^a	70.5 ± 11.1	53.1 ± 17.2	<.001
Sex, % male	74.6	25.4	<.001
Ancestry, % African-American	67.1	32.9	.143
MD, dB^b	−4.3 (−5.6, −2.4, −1.2)	0.4 (−0.4, 0.6, 1.2)	<.001
PSD, dB^b	4.8 (2.1, 3.3, 7.5)	1.5 (1.3, 1.5, 1.7)	<.001
Global RNFL thickness, μm^a	73 ± 15	97 ± 10	<.001

MD = mean deviation; PSD = pattern standard deviation; RNFL = retinal nerve fiber layer.

Normally distributed variables; represented by mean (standard deviation).

Non-normally distributed variables; represented by mean (first quartile, median, third quartile).