Correlations between Steady-State Pattern Electroretinogram and Humphrey Visual Field Analyzer Global Indices and Their Associations with Retinal Ganglion Cell Layer-Inner Plexiform Layer Thickness in Glaucoma Suspects
Table 2
Comparison of demographic and clinical characteristics between eyes with normal and abnormal ss-PERG.
Group 1 (normal ss-PERG)
Group 2 (abnormal ss-PERG)
N = 34 eyes
N = 15 eyes
Age (years)
55.97 ± 11.35
64.87 ± 13.82
No. of females (%)
22 (64.7%)
9 (60%)
BCVA (logMAR)
0.03 ± 0.09
0.04 ± 0.06
Spherical equivalent (diopter)
−0.95 ± 2.60
−1.51 ± 2.40
Central corneal thickness (µm)
546.14 ± 34.35
560.77 ± 26.20
Intraocular pressure (mm Hg)
17.29 ± 3.82
17.93 ± 4.88
24-2 VF MD (dB)
0.35 ± 0.92
−0.66 ± 1.06
24-2 VF PSD (dB)
1.44 ± 0.23
1.83 ± 0.64
VFI (%)
99.50 ± 0.66
98.64 ± 1.08
10-2 VF MD (dB)
0.21 ± 0.82
−025 ± 0.83
10-2 VF PSD (dB)
1.17 ± 0.21
1.22 ± 0.20
Rim area (mm2)
1.18 ± 0.17
1.02 ± 0.15
Disc area (mm2)
2.03 ± 0.56
1.81 ± 0.34
Average C/D ratio
0.64 ± 0.17
0.68 ± 0.15
Vertical C/D ratio
0.62 ± 0.16
0.66 ± 0.14
Cup volume (mm2)
0.33 ± 0.25
0.27 ± 0.16
Circumpapillary RNFL thickness on spectral-domain OCT
Global average (µm)
92.75 ± 9.04
85.50 ± 9.66
Superior quadrant (µm)
110.22 ± 17.58
95.07 ± 13.46
Temporal quadrant (µm)
68.53 ± 12.07
66.64 ± 20.31
Inferior quadrant (µm)
122.12 ± 12.38
109.64 ± 15.79
Nasal quadrant (µm)
70.38 ± 8.00
69.64 ± 9.55
Macular GCL+IPL thickness on spectral-domain OCT
Average (µm)
80.48 ± 5.48
76.92 ± 15.80
Minimum (µm)
78.61 ± 5.45
71.54 ± 5.17
Superior sector (µm)
79.97 ± 6.02
72.15 ± 5.65
Superior nasal sector (µm)
81.24 ± 6.55
78.08 ± 13.87
Inferior nasal sector (µm)
79.82 ± 6.04
79.62 ± 22.91
Inferior sector (µm)
77.72 ± 5.88
78.54 ± 28.19
Inferior temporal sector (µm)
81.00 ± 5.94
80.46 ± 21.79
Superior temporal (µm)
79.18 ± 5.81
74.15 ± 7.38
Unless noted, values are expressed as the mean ± SD. Significant difference between the two groups (). BCVA: best corrected visual acuity, MD: mean deviation, PSD: pattern standard deviation, VFI: visual field index, ss-PERG: steady state pattern electroretinogram, OCT: optical coherence tomography, RNFL: retinal nerve fiber layer, GCL + IPL: ganglion cell inner plexiform layer.
