Table 2 Optical coherence tomography parameters in each group.

	Control group	GS group	NTG group	POAG group	P-value	Post-hoc P-values
	Control group	GS group	NTG group	POAG group	P-value	Control vs. GS	Control vs. NTG	Control vs. POAG	GS vs. NTG	GS vs. POAG	NTG vs. POAG
Disc parameters
Rim area (mm²)	1.26 ± 0.18	1.16 ± 0.25	0.89 ± 0.21	0.79 ± 0.30	< 0.001	0.301	< 0.001	< 0.001	< 0.001	< 0.001	0.064
Disc area (mm²)	1.90 ± 0.38	2.05 ± 0.44	2.00 ± 0.49	1.85 ± 0.47	0.112
CD ratio	0.54 ± 0.12	0.63 ± 0.13	0.71 ± 0.13	0.73 ± 0.13	< 0.001	0.032	< 0.001	< 0.001	0.009	0.002	0.900
RNFL (μm)
Average	96.6 ± 8.9	95.0 ± 11.8	77.3 ± 11.1	76.3 ± 15.9	< 0.001	0.922	< 0.001	< 0.001	< 0.001	< 0.001	0.461
Superior	120.3 ± 15.8	117.1 ± 18.2	90.5 ± 22.4	87.7 ± 24.2	< 0.001	0.922	< 0.001	< 0.001	< 0.001	< 0.001	0.254
Temporal	70.3 ± 10.1	72.6 ± 12.4	65.9 ± 16.8	61.1 ± 18.5	0.003	0.927	0.425	0.012	0.229	0.008	0.274
Inferior	121.8 ± 1.3	120.4 ± 20.9	87.2 ± 23.1	86.8 ± 26.7	< 0.001	0.995	< 0.001	< 0.001	< 0.001	< 0.001	0.999
Nasal	70.6 ± 10.6	69.7 ± 9.5	68.5 ± 12.7	67.6 ± 11.4	0.555

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