Table 4. Comparison of IVCM parameters.
| Groups | CNFD (/mm2; mean±SD) | CNBD (/mm2; mean±SD) | CNFL (mm/mm2; mean±SD) | CNFT [M (Q1, Q3)] |
| Control group | 37.51±6.45 | 51.29±9.74 | 21.49±2.85 | 3 (2, 3) |
| NDR group | 35.01±10.46 | 48.71±17.10 | 18.85±4.17 | 1 (1, 2) |
| NPDR group | 24.48±7.07 | 33.05±16.14 | 15.51±2.49 | 1 (1, 1) |
| PDR group | 16.56±6.62 | 21.36±9.74 | 10.11±3.03 | 1 (0, 1) |
| F/H | 70.589 | 60.171 | 76.625 | 71.207 |
| P | <0.001 | <0. 001 | <0.001 | <0.001 |
NDR: No diabetic retinopathy; NPDR: Non-proliferative diabetic retinopathy; PDR: Proliferative diabetic retinopathy; CNFD: Corneal nerve fiber density; CNBD: Corneal nerve branch density; CNFL: Corneal nerve fiber length; CNFT: Corneal nerve fiber tortuosity; M: Median.