Table 2.
Mixed-effects linear regression analysis of the association between race and mean macular capillary parameters.
| Macular capillary parameter | Regression coefficient | P value | Regression coefficient* | P* value |
|---|---|---|---|---|
| SCP VD (%) | ||||
| Fovea | 2.53 (0.37–5.04) | 0.047 | 2.81 (0.084–5.54) | 0.043 |
| Parafovea | 1.71 (0.45–2.97) | 0.008 | 1.37 (0.27–2.47) | 0.014 |
| Total area of fovea and parafovea | 0.98 (− 0.31–2.26) | 0.136 | 0.66 (− 0.54–1.86) | 0.284 |
| ICP VD (%) | ||||
| Fovea | 4.21 (1.24–7.18) | 0.005 | 3.96 (0.82–7.11) | 0.014 |
| Parafovea | 2.24 (0.69–3.78) | 0.005 | 2.64 (0.98–4.30) | 0.002 |
| Total area of fovea and parafovea | 1.26 (− 0.23–2.76) | 0.097 | 1.54 (0.01–3.06) | 0.048 |
| DCP VD (%) | ||||
| Fovea | 1.67 (− 0.91–4.26) | 0.205 | 2.28 (− 0.41–4.96) | 0.096 |
| Parafovea | 1.25 (− 1.28–3.78) | 0.332 | 2.25 (− 0.42–4.92) | 0.098 |
| Total area of fovea and parafovea | 0.86 (− 1.48–3.19) | 0.473 | 1.54 (− 0.98–4.07) | 0.23 |
| FAZ Area (mm2) | − 0.10 (− 0.16–(− 0.05)) | < 0.001 | − 0.07 (− 0.12–(− 0.02) | 0.006 |
| FAZ Perimeter (mm) | − 0.29 (− 0.46–(− 0.12)) | 0.001 | − 0.23 (− 0.41–(− 0.47)) | 0.014 |
| FAZ Acircularity Index | 0.035 (0.008–0.061) | 0.01 | 0.023 (− 0.002–0.49) | 0.076 |
| FD-300 | − 2.64 (− 4.02–(− 1.23)) | < 0.001 | − 2.34 (− 3.71–(− 0.97)) | 0.001 |
| Choriocapillaris BFA (%) | ||||
| Fovea | 1.2 (0.06–2.3) | 0.039 | 1.1 (− 0.10–2.3) | 0.073 |
| Parafovea | 2.4 (0.46–4.4) | 0.016 | 2.4 (0.19–4.6) | 0.033 |
| Total area of fovea and parafovea | 1.5 (0.47–2.5) | 0.004 | 1.5 (0.34–2.6) | 0.011 |
Regression Coefficient and P value accounting for 2 eyes of the same subject. Regression Coefficient* and P* value accounting for 2 eyes of the same subject and adjusting for 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.