A Small Disc Area Is a Risk Factor for Visual Field Loss Progression in Primary Open-Angle Glaucoma: The Glaucoma Stereo Analysis Study

Table 2

Comparison of ONH parameters between the progression and no-progression groups.

Optic nerve head parameters	Progression ()	No-progression ()	Value
Vertical disc width	1.79 ± 0.18	1.89 ± 0.24	0.017
Horizontal disc width	1.60 ± 0.24	1.69 ± 0.29	0.052
Vertical cup-disc ratio	0.83 ± 0.08	0.82 ± 0.08	0.574
Horizontal cup-disc ratio	0.73 ± 0.08	0.75 ± 0.09	0.227
Minimum rim-disc ratio	0.018 ± 0.024	0.018 ± 0.025	0.979
Superior minimum rim-disc ratio	0.077 ± 0.055	0.086 ± 0.060	0.363
Inferior minimum rim-disc ratio	0.043 ± 0.060	0.033 ± 0.040	0.209
Superior rim width	0.19 ± 0.09	0.21 ± 0.10	0.161
Inferior rim width	0.12 ± 0.11	0.12 ± 0.09	0.922
Mean cup depth	0.19 ± 0.07	0.21 ± 0.09	0.202
Maximum cup depth	0.50 ± 0.15	0.53 ± 0.20	0.368
Height variation contour	0.57 ± 0.22	0.58 ± 0.28	0.738
Disc area	2.24 ± 0.46	2.49 ± 0.67	0.016
Cup area	1.30 ± 0.47	1.50 ± 0.59	0.029
Cup-disc area ratio	0.57 ± 0.12	0.59 ± 0.11	0.265
Rim area	0.94 ± 0.26	0.99 ± 0.27	0.301
Rim-disc area ratio	0.43 ± 0.12	0.41 ± 0.11	0.265
Rim-disc ratio of section 1	0.076 ± 0.045	0.067 ± 0.046	0.204
Rim-disc ratio of section 2	0.11 ± 0.05	0.11 ± 0.06	0.94
Rim-disc ratio of section 3	0.18 ± 0.06	0.17 ± 0.06	0.257
Rim-disc ratio of section 4	0.20 ± 0.08	0.19 ± 0.07	0.462
Rim-disc ratio of section 5	0.15 ± 0.09	0.14 ± 0.08	0.568
Rim-disc ratio of section 6	0.065 ± 0.061	0.056 ± 0.045	0.293
Disc volume	0.87 ± 0.29	0.96 ± 0.47	0.217
Cup volume	0.25 ± 0.14	0.33 ± 0.24	0.04
Rim volume	0.17 ± 0.09	0.17 ± 0.10	0.995
Rim decentering	0.28 ± 0.44	0.31 ± 0.42	0.668
Disc tilt angle	11.51 ± 12.97	10.07 ± 12.29	0.486