Table 4.
The mean cone density in 4 retinal quadrants at 2° eccentricities in both groups (n = 56) and the DR group (mild NPDR, n = 22; moderate NPDR, n = 14).
| Quadrants | Mean (±SD) cone density, cone/mm2 DR groupa |
Mean (±SD) cone density, cone/mm2 Control groupb |
p value |
|---|---|---|---|
| T | 19625 ± 4352 | 26478 ± 2211 | <0.001† |
| N | 20068 ± 4939 | 25586 ± 2154 | <0.001† |
| S | 19097 ± 4439 | 25387 ± 2769 | <0.001† |
| I | 19778 ± 4253 | 24923 ± 3024 | <0.001† |
| 4 quadrants | 19822 ± 4342 | 24722 ± 3507 | <0.001† |
| Mild NPDR group | Moderate NPDR group | ||
| 4 quadrants | 20440 ± 4522 | 18688 ± 3919 | 0.260† |
†t-test; ‡Friedman ANOVA test; ap value ‡for all quadrants (in column) p = 0.090; bp value ‡for all quadrants (in column) p = 0.241. p = value for all quadrants for whole group n = 56 (in columns) p = 0.245. Abbreviations: SD: standard deviation; DR: diabetic retinopathy; NPDR: nonproliferative diabetic retinopathy; T: temporal; N: nasal; S: superior; I: inferior.