Table 2. Comparison of OCTA parameters between Black and White subjects.

Macular Capillary Parameter	All White Subjects	All Black Subjects	P-valuea	Non-HTN White Subjects	Non-HTN Black Subjects	P-valueb
SCP VD (%)
3x3 mm macular area	45.74 ± 4.22	46.03 ± 4.41	0.28	46.02 ± 3.87	47.92 ± 3.40	0.33
Fovea	21.07 ± 8.07	15.03 ± 7.54	0.02*	20.93 ± 7.79	17.37 ± 8.01	0.13
Parafovea	48.49 ± 3.99	49.33 ± 4.41	0.09	48.79 ± 3.69	51.15 ± 3.44	0.15
ICP VD (%)
3x3 mm macular area	43.74 ± 4.10	43.88 ± 4.30	0.42	44.17 ± 3.60	43.29 ± 3.50	0.053
Fovea	35.44 ± 6.51	28.03 ± 8.19	< 0.001*	35.52 ± 6.84	30.95 ± 8.14	0.008*
Parafovea	44.98 ± 4.66	45.77 ± 4.66	0.98	45.38 ± 4.13	44.93 ± 3.41	0.28
DCP VD (%)
3x3 mm macular area	40.91 ± 10.75	42.60 ± 8.47	0.73	39.10 ± 10.19	43.03 ± 7.69	0.74
Fovea	25.32 ± 10.36	23.58 ± 8.96	0.33	23.21 ± 8.67	25.77 ± 9.8	0.76
Parafovea	43.11 ± 11.23	45.20 ± 8.77	0.59	41.33 ± 10.91	45.34 ± 8.01	0.70
FAZ
Area (mm^2)	.23 ± .10	.35 ± .12	<0.001*	0.24 ± .11	0.34 ± .13	0.003*
Perimeter (mm)	1.88 ± .44	2.38 ± .39	<0.001*	1.92 ± .45	2.31 ± .47	0.003*
Acircularity Index (AI)	1.14 ± .048	1.14 ± .055	0.16	1.15 ± .05	1.14 ± .05	0.21
FD-300 area density (%)	49.20 ± 3.53	51.21 ± 3.76	0.001*	49.92 ± 3.30	51.95 ± 3.54	0.02*
Choriocapillaris BFA (%)
3x3 mm macular area	69.77 ± 3.07	66.10 ± 4.71	0.006*	69.83 ± 2.86	67.29 ± 3.31	0.01*
Fovea	69.95 ± 4.40	66.86 ± 3.77	0.03*	69.72 ± 3.64	67.83 ± 4.35	0.26
Parafovea	69.71 ± 3.94	65.81 ± 3.94	0.008*	69.85 ± 2.87	67.22 ± 3.40	0.01*

^aP-values were calculated using a mixed-effects linear regression model that adjusted for two eyes of the same patient and hypertension.

^bP-values were calculated using a mixed-effects linear regression model that adjusted for two eyes of the same patient in a cohort without hypertension.

*Significant at P < 0.05.

HTN: Hypertension; VD: Vessel density, FAZ: Foveal avascular zone, BFA: Blood blow area, SCP: Superficial capillary plexus, ICP: Intermediate capillary plexus, DCP: Deep capillary plexus.