Table 1. .

Demographic and Clinical Characteristics of the Preperimetric Glaucoma and Control Study Groups

Characteristics	Preperimetric Glaucoma, n = 48	Control, n = 94	P Value
Age, y	65.9 ± 9.1	64.2 ± 11.2	0.427
% male	52.4	30.6	0.035
% African American	16.7	4.1	0.108
MD, dB	−0.81 (−1.82, −0.80, 0.12)	0.02 (−0.64, 0.25, 0.83)	0.001
PSD, dB	1.75 (1.46, 1.70, 1.84)	1.63 (1.29, 1.58, 1.81)	0.049
Follow-up, y	13.6 ± 4.2	12.8 ± 3.6	0.297

MD, mean deviation; PSD, pattern standard deviation.