Table 3 Macular capillary parameters measured using optical coherence tomography angiography in white and black subjects.

From: Evaluation of flow of chorioretinal capillaries in healthy black and white subjects using optical coherence tomography angiography

Macular capillary parameter

White subjects

Black subjects

P* value

SCP VD (%)

Fovea

20.7 ± 3.90

18.2 ± 6.01

0.043

Parafovea

51.2 ± 2.38

49.9 ± 2.75

0.014

Total Area of Fovea and Parafovea

47.8 ± 2.30

47.1 + 2.73

0.284

ICP VD (%)

Fovea

30.4 ± 7.55

26.5 ± 8.61

0.014

Parafovea

47.2 ± 3.11

45.1 ± 2.81

0.002

Total Area of Fovea and Parafovea

44.9 ± 2.53

43.4 ± 2.70

0.048

DCP VD (%)

Fovea

21.7 ± 5.72

20.3 ± 7.03

0.096

Parafovea

40.7 ± 5.14

40.0 ± 6.18

0.098

Total Area of Fovea and Parafovea

38.1 ± 5.26

37.5 ± 5.26

0.23

FAZ Area (mm2)

0.221 ± 0.07

0.332 ± 0.12

0.006

FAZ Perimeter (mm)

1.91 ± 0.30

2.22 ± 0.38

0.014

FAZ Acircularity Index

1.15 ± 0.080

1.11 ± 0.036

0.076

FD-300

50.3 ± 3.20

53.3 ± 2.84

0.001

Choriocapillaris BFA (%)

Fovea

62.5 ± 1.6

61.0 ± 3.5

0.073

Parafovea

57.3 ± 4.3

54.7 ± 3.3

0.033

Total area of fovea and parafovea

66.5 ± 1.8

64.9 ± 2.9

0.011

  1. Data provided show the results of a mixed effects regression correlating race and macular capillary parameters, adjusting for 2 eyes of the same patient and axial length. Data are provided as mean ± standard deviation. Fovea refers to the central 1-mm diameter circular area. Parafovea refers to the 3-mm diameter area excluding the central 1-mm diameter. P* value calculated controlling for 2 eyes of the same patient, and axial length. VD = vessel density. SCP = superficial capillary plexus. ICP = intermediate capillary plexus. DCP = deep capillary plexus. FAZ = foveal avascular zone. FD-300 = capillary density in a 300 μm wide region around the FAZ. BFA = blood flow area.
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