Table 1 Participants’ characteristics.

From: Hemifield-based analysis of pattern electroretinography in normal subjects and patients with preperimetric glaucoma

Characteristics

Control group (N = 32)

Preperimetric glaucoma group (N = 33)

P-value

Age (years)

48.63 ± 7.30

52.58 ± 10.57

0.085a

Gender (n, %)

 Male

13 (40.6)

19 (57.6)

0.172b

 Female

19 (59.4)

14 (42.4)

BCVA (logMAR)

0.00 ± 0.02

 − 0.03 ± 0.10

0.419c

Spherical equivalent

 − 2.54 ± 2.67

 − 3.31 ± 2.44

0.254a

Central corneal thickness (μm)

547.50 ± 29.45

536.48 ± 29.97

0.161a

Axial length (mm)

24.36 ± 1.63

25.13 ± 1.60

0.105a

Intraocular pressure (mmHg)

15.53 ± 2.79

13.79 ± 3.06

0.020a

SD-OCT

 Average RNFL thickness (μm)

94.69 ± 10.07

77.79 ± 8.77

 < 0.001a

 Average GCIPL thickness (μm)

81.53 ± 5.39

73.39 ± 6.13

 < 0.001a

SAP

 MD (dB)

 − 1.73 ± 1.30

 − 1.19 ± 1.30

0.095a

 PSD (dB)

1.66 ± 0.37

1.83 ± 0.50

0.131a

 Affected HF average total deviation (dB)

N/A

 − 1.24 ± 1.67

N/A

  1. Values are mean ± standard deviations.
  2. Bold indicates that the P value reached statistical significance (< 0.05).
  3. BCVA, best-corrected visual acuity; logMAR, logarithm of the minimum angle of resolution; SD-OCT, spectral-domain optical coherence tomography; RNFL, retinal nerve fiber layer; GCIPL, ganglion cell–inner plexiform layer; SAP, standard automated perimetry; MD, mean deviation; PSD, pattern standard deviation; HF, hemifield.
  4. aStudent t test.
  5. bChi-square test.
  6. cMann–Whitney test.