Comparison of structural parameters in the control group and NDR group
| Parameters | Control group (n=62) | NDR group (n=66) | P value |
| VD of SCP (parafovea, %) | 52.47±4.31 | 49.97±4.45 | 0.002** |
| VD of SCP (perifovea, %) | 50.42±3.73 | 48.12±4.01 | 0.001** |
| VD of DCP (parafovea, %) | 55.99±4.09 | 52.70±4.51 | <0.001** |
| VD of DCP (perifovea, %) | 52.71±6.56 | 48.62±6.39 | 0.001** |
| FD300 (%) | 55.49±4.28 | 51.13±5.55 | <0.001** |
| GCC thickness (μm) | 98.26±6.46 | 98.80±7.50 | 0.661 |
| Peripapillary VD (%) | 52.48±2.73 | 50.27±4.10 | <0.001** |
| RNFL thickness (μm) | 115.06±10.61 | 109.85±11.50 | 0.009** |
*P<0.05; **P<0.01.
DCP, deep capillary plexus; FD300, foveal density in a 300 µm wide region around foveal avascular zone; GCC, ganglion cell complex; NDR, patients with diabetes without clinically detectable retinopathy; RNFL, retinal nerve fibre layer; SCP, superficial capillary plexus; VD, vessel density.