Table 3. Functional characteristics of the studied groups.

Parameter	Healthy	Mild POAG	Moderate/Severe POAG	P Values†
				Mild vs Healthy	Moderate/ Severe vs Healthy	Moderate/ Severe vs Mild
Average sensitivity thershold (dB)	26.7±1.4	25.3±2.3	20.2±5.4	0.134	<0.001	<0.001
Macular integrity index	71.6±20.2	80.2±21.5	92.2±15.4	0.173	0.005	0.07
VFI (%)	98±1.5	95.8±3.6	62.1±27	0.573	<0.001	<0.001
MD (dB)	-1.8±1.5	-2.6±1.5	-13.4±7.3	0.431	<0.001	<0.001
PSD (dB)	2.4±0.6	2.8±1.6	8.6±3.7	0.221	0.023	0.187

^†P Values adjusted for age and inter-eye correlation based on Linear Mixed Effects Model.

Abbreviations: POAG = primary open-angle glaucoma; VFI = visual field index; MD = mean deviation; PSD = pattern standard deviation.