Table 3.
Correlation coefficients for DR severity and association of variables with RPC density in OCTA.
| RPC density | |||
|---|---|---|---|
| Whole image | Inside optic disc | Peripapillary | |
| DR severity | |||
| R valuea | −0.536 | −0.269 | −0.541 |
| P value | <0.01 | <0.01 | <0.01 |
|
| |||
| Age | |||
| R valueb | −0.132 | −0.237 | −0.142 |
| P value | 0.027 | <0.01 | 0.017 |
|
| |||
| DM duration | |||
| R valuec | −0.191 | −0.024 | −0.209 |
| P value | <0.01 | 0.734 | <0.01 |
|
| |||
| HbA1c | |||
| R valuec | −0.188 | −0.141 | −0.146 |
| P value | 0.01 | 0.045 | 0.037 |
|
| |||
| BCVA | |||
| R valuec | −0.053 | −0.031 | −0.042 |
| P value | 0.447 | 0.662 | 0.547 |
a, Spearman coefficient R value; b, Pearson coefficient R value; c, partial correlation coefficient R value; RPC, radial peripapillary capillary; DR, diabetic retinopathy; DM, diabetes mellitus; HbA1c, hemoglobin A1c; BCVA, best-corrected vision acuity.