Table 2.
GDx VCC parameters of enrolled subjects
| Parameter/group | Normal subjects
|
Diabetics without retinopathy
|
Diabetics with mild retinopathy
|
ANOVA test for three groups
|
Mann–Whitney U test for diabetic groups
|
|---|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | P-value | P-value | |
| TSNIT average (μm) | 58.8 ± 4.5 | 56.7 ± 6.8 | 55.9 ± 7.0 | 0.27 | 0.89 |
| Superior average (μm) | 68.5 ± 6.5 | 64.8 ± 9.7 | 64.5 ± 8.8 | 0.18 | 0.69 |
| Inferior average (μm) | 68.3 ± 7.4 | 61.6 ± 10.1 | 62.6 ± 8.4 | 0.02 | 0.79 |
| TSNIT SD (μm) | 22.3 ± 4.9 | 18.9 ± 5.4 | 18.8 ± 4.5 | 0.02 | 0.58 |
| NFI | 15.3 ± 5.4 | 21.7 ± 11.9 | 20.8 ± 9.6 | 0.04 | 0.57 |
| Inter-eye symmetry | 0.9 ± 0.1 | 0.7 ± 0.2 | 0.7 ± 0.2 | 0.01 | 0.16 |
Abbreviations: ANOVA, analysis of variance; NFI, nerve fiber indicator; SD, standard deviation; TSNIT, temporal-superior-nasal-inferior-temporal.