Table 4.

Comparison of the optical coherence tomography angiography parameters in the superficial capillary plexus in macular vasculature

OCTA parameters		Unaffected fellow eye (n = 30)	Control (n = 31)
		Adjusted mean (standard error)		p-value
Center	VD (mm-1)	7.87 (0.54)	10.31 (0.53)	0.002*
	PD (%)	18.07 (1.26)	23.20 (1.24)	0.006*
Inner	VD (mm-1)
	Average	16.89 (0.31)	18.31 (0.30)	0.002*
	Superior	16.81 (0.35)	18.31 (0.35)	0.004*
	Temporal	16.31 (0.47)	18.11 (0.46)	0.010*
	Inferior	17.18 (0.33)	18.58 (0.33)	0.005*
	Nasal	17.26 (0.28)	18.26 (0.28)	0.017*
	PD (%)
	Average	40.26 (0.82)	43.72 (0.80)	0.004*
	Superior	40.05 (1.14)	43.46 (1.12)	0.041*
	Temporal	39.10 (1.19)	43.09 (1.17)	0.023*
	Inferior	41.28 (0.86)	45.03 (0.85)	0.004*
	Nasal	40.59 (0.75)	43.31 (0.73)	0.014*
Outer	VD (mm-1)
	Average	16.62 (0.31)	18.35 (0.30)	< 0.001*
	Superior	16.63 (0.36)	18.28 (0.36)	0.002*
	Temporal	15.25 (0.48)	17.27 (0.47)	0.005*
	Inferior	16.15 (0.42)	18.46 (0.41)	< 0.001*
	Nasal	18.45 (0.27)	19.39 (0.26)	0.016*
	PD (%)
	Average	40.67 (0.93)	44.83 (0.91)	0.003*
	Superior	40.11 (1.38)	44.53 (1.35)	0.029*
	Temporal	37.03 (1.28)	42.52 (1.25)	0.004*
	Inferior	40.06 (1.08)	46.39 (1.06)	< 0.001*
	Nasal	45.24 (0.75)	47.30 (0.74)	0.059
Total	VD (mm-1)	16.40 (0.30)	18.12 (0.29)	< 0.001*
	PD (%)	40.39 (0.89)	44.15 (0.87)	0.005*
FAZ	Area (mm2)	0.27 (0.03)	0.27 (0.03)	0.995
	Perimeter (mm)	2.19 (0.12)	2.14 (0.84)	0.808
	Circularity	0.67 (0.08)	0.73 (0.11)	0.037*

OCTA = optical coherence tomography angiography; VD = vessel density; PD = perfusion density; FAZ = foveal avascular zone; center = circular area with 0.5 mm for its radius centered on fovea; inner = ring-shaped area about 0.5–1.5 mm centered on fovea; outer = ring-shaped area about 1.5–3.0 mm centered on fovea; total = circular area with 3 mm for its radius centered on fovea

P-value calculated by analysis of covariance to compare between two groups adjusted for age, sex, axial length; *p-value < 0.05