Table 1. Comparison of corneal nerve fiber parameters between the DM group and the control group.
| Parameters | Diabetes group (n=43) | Control group (n=21) | t | P |
| CNFL (mm/mm2) | 16.60±5.14 | 19.65±3.32 | -2.48 | 0.016a |
| CNFD (n/mm2) | 34.01±10.14 | 44.05±10.91 | -3.63 | 0.001b |
| CNBD (n/mm2) | 34.88±22.04 | 38.39±18.68 | -0.63 | 0.533 |
| Main branch length density (mm/mm2) | 11.92±3.45 | 15.00±3.33 | -3.39 | 0.001b |
| Branch length density (mm/mm2) | 4.68±3.00 | 4.65±1.78 | 0.04 | 0.966 |
| NT score | 1.77±0.90 | 1.76±1.04 | 0.022 | 0.983 |
| LCs density (n/frame) | 2.95±3.02 | 1.67±1.59 | 1.83 | 0.07 |
aP<0.05; bP<0.01. SD: Standard deviation; CNFL: Corneal nerve fiber length; CNFD: Corneal nerve fiber density; CNBD: Corneal nerve branch fiber density; NT: Nerve fiber tortuosity; LC: Langerhans cell; DM: Diabetes mellitus.
mean±SD