Optic Nerve Head Hemoglobin Levels in Glaucoma: A Structural and Functional Correlation Study

Table 2

Glaucoma discriminant function index and average peripapillary retinal nerve fiber layer thickness by disease stage.

Variables^a	Control group (n = 90)	Mild glaucoma (n = 66)	Moderate glaucoma (n = 13)	Advanced glaucoma (n = 25)	value
GDF index	16.25 ± 14.17	−24.59 ± 16.50	−31.65 ± 15.40	−34.26 ± 24.90	<0.001^b
pRNFL thickness (μm)	102.27 ± 14.40	87.79 ± 11.68	77.24 ± 4.50	67.60 ± 8.84	<0.001^c
VFMD index (dB)	−0.76 ± 2.05	−2.21 ± 1.67	−8.43 ± 1.67	−19.62 ± 6.17	<0.001^c

^aData are given as mean ± SD. ^bEach glaucoma group differed significantly from controls. There was also a significant difference between eyes with mild and advanced glaucoma. ^cEach glaucoma group differed significantly from controls. There were also significant differences between eyes with mild and advanced glaucoma and between eyes with moderate and advanced glaucoma.