Table 1. Clinical characteristics of the control and early glaucoma groups.
| Parameters | Healthy (n=85) | Early glaucoma (n=90) | P |
| Age (y) | 61.07±8.93 | 65.61±10.20 | 0.005a |
| Male (%) | 55.2 | 43.3 | 0.141b |
| Left eye (%) | 44.7 | 60.0 | 0.051b |
| VA (logMAR) | 0.02±0.05 | 0.07±0.09 | <0.001a |
| SE (D) | 0.21±1.33 | 0.45±1.60 | 0.332a |
| IOP (mm Hg) | 17.21±2.01 | 22.56±3.6 | <0.001a |
| VFI (%) | 98.54±1.47 | 86.90±8.12 | <0.001c |
| SAP MD (dB) | -0.64±1.36 | -47.74±1.76 | <0.001c |
| SAP PSD (dB) | 1.85±0.50 | 6.09±2.90 | <0.001c |
VA: Visual acuity; SE: Spherical equivalent; D: Diopters; IOP: Intraocular pressure; VFI: Visual field index; SAP: Standard automated perimetry; MD: Mean deviation; PSD: Pattern standard deviation. aUnpaired t-test; bχ2 test; cKrusal-Wallis test.