Table 2.
GCC and RNFL thickness analysis of diabetic eyes compared with control group.
| Subfield Analyzed | Diabetic Eyes (n = 34) | Control Eyes (n = 32) | |
|---|---|---|---|
| Mean ± SD | Mean ± SD | p Value * | |
| GCC thickness (µm) | |||
| 1-mm central circle | 16.1 ± 3.3 | 15.7 ± 3.3 | 0.653 |
| 3-mm S subfield | 54.9 ± 5.8 | 54.6 ± 3.4 | 0.789 |
| 6-mm S subfield | 37.5 ± 3.2 | 34.9 ± 3.1 | 0.001 |
| 3-mm I subfield | 53.8 ± 5.2 | 53.6 ± 3.3 | 0.854 |
| 6-mm I subfield | 37.2 ± 4.8 | 34.9 ± 3.2 | 0.025 |
| 3-mm N subfield | 54.2 ± 5.0 | 52.9 ± 3.5 | 0.229 |
| 6-mm N subfield | 40.0 ± 4.1 | 38.7 ± 3.3 | 0.167 |
| 3-mm T subfield | 49.3 ± 6.0 | 49.9 ± 4.2 | 0.651 |
| 6-mm T subfield | 39.6 ± 4.7 | 36.5 ± 3.5 | 0.004 |
| Macular RNFL thickness (µm) | |||
| 1-mm central circle | 12.7 ± 1.7 | 12.6 ± 1.3 | 0.832 |
| 3-mm S subfield | 24.2 ± 3.1 | 23.6 ± 3.0 | 0.390 |
| 6-mm S subfield | 36.9 ± 5.0 | 35.6 ± 4.4 | 0.262 |
| 3-mm I subfield | 24.5 ± 2.4 | 24.1 ± 2.5 | 0.477 |
| 6-mm I subfield | 39.9 ± 6.7 | 37.7 ± 5.3 | 0.130 |
| 3-mm N subfield | 21.2 ± 1.9 | 20.7 ± 1.8 | 0.227 |
| 6-mm N subfield | 50.5 ± 6.4 | 48.6 ± 6.8 | 0.240 |
| 3-mm T subfield | 16.2 ± 0.9 | 16.0 ± 1.1 | 0.334 |
| 6-mm T subfield | 17.7 ± 0.9 | 17.9 ± 1.2 | 0.332 |
| Peripapillary RNFL thickness (µm) | |||
| G | 87.7 ± 8.0 | 88.0 ± 9.8 | 0.912 |
| N subfield | 67.7 ± 9.5 | 73.6 ± 15.1 | 0.234 |
| NS subfield | 102.4 ± 17.9 | 100.6 ± 22.8 | 0.720 |
| TS subfield | 116.3 ± 25.1 | 121.0 ± 19.1 | 0.415 |
| T subfield | 67.0 ± 9.9 | 66.2 ± 15.6 | 0.798 |
| TI subfield | 126.1 ± 26.0 | 132.3 ± 19.8 | 0.297 |
| NI subfield | 100.6 ± 24.9 | 93.6 ± 24.7 | 0.268 |
GCC: ganglion cell complex; RNFL: retinal nerve fiber layer; n: number; SD: standard deviation; S: superior; I: inferior; N: nasal; T: temporal; G: central. *: Student’s t test for independent samples.