Table 3.
The total length of the photoreceptors at different locations in healthy volunteers and in patients with diabetes, diabetic retinopathy, or diabetic retinopathy with macular edema.
| Groups | Mean subfoveal TLP (μm) (range) | Mean nasal TLP (μm) (range) | Mean temporal TLP (μm) (range) |
|---|---|---|---|
| Healthy(60 eyes) | |||
| 1st OCT image | 50.7 ± 2.5 (43–57) | 36.1 ± 3.0 (27–43) | 37.0 ± 2.1 (32–43) |
| 2nd OCT image | 50.6 ± 2.7 (44–56) | 36.7 ± 2.2 (31–42) | 36.2 ± 2.4 (30–41) |
| DM without DR (36 eyes) | |||
| 1st OCT image | 50.2 ± 3.0 (40–55) | 36.2 ± 2.5 (29–41) | 36.7 ± 2.7 (32–43) |
| 2nd OCT image | 49.5 ± 4.8 (26–53) | 36.5 ± 3.0 (30–42) | 37.1 ± 2.9 (33–45) |
| DR (27 eyes) | |||
| 1st OCT image | 48.2 ± 5.7 (32–56) | 36.5 ± 3.8 (26–43) | 36.6 ± 3.0 (30–45) |
| 2nd OCT image | 48.6 ± 6.2 (34–58) | 35.8 ± 3.8 (22–41) | 36.8 ± 2.7 (33–42) |
| DR with DME (33 eyes) | |||
| 1st OCT image | 44.1 ± 7.4 (19–50) | 36.7 ± 5.4 (26–52) | 36.5 ± 6.9 (23–52) |
| 2nd OCT image | 43.0 ± 7.4 (26–54) | 36.6 ± 4.1 (28–47) | 37.9 ± 5.1 (27–48) |
| p value for ANOVA test | |||
| 1st OCT image | < 0.001* | 0.9 | 0.9 |
| 2nd OCT image | < 0.001* | 0.6 | 0.1 |
Abbreviations: OCT; optical coherence tomography; DM, diabetes mellitus; DR, diabetic retinopathy; DME, diabetic macular edema; TLP: the total length of the photoreceptors; μm, micrometer.
*
Bold values indicate statistical significance.