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| Retinopathy grade | With CKD (%) | Without CKD (%) | OR (95% CI) | Chi-square | p-value |
| 0 | 3 (10.7) | 10 (16.6) | 1 | – | – |
| 1 | 9 (32.1) | 26 (43.3) | 1.2 (0.3–5.2) | 0.04 | 0.85 |
| 2 | 2 (7.1) | 13 (21.7) | 0.5 (0.07–3.7) | 0.03 | 0.86 |
| 3 | 10 (35.7) | 10 (16.7) | 3.3 (0.7–15.9) | 1.4 | 0.24 |
| 4 | 4 (14.3) | 1 (1.7) | 13.3 (1.1–169.1) | 2.8 | 0.09 |
OR: odd ratio, CI: confidence interval.
