Table 2. OCT and OCTA parameters of the participants.
| Examinations | Parameters | Parkinson disease (n=35) | Control (n=35) | P |
|---|---|---|---|---|
| OCT | RNFL average (μm) | 103.00 (93.00, 109.00) | 102.00 (93.00, 105.00) | 0.358 |
| S (μm) | 125.09±14.57 | 125.00±14.02 | 0.980 | |
| I (μm) | 133.80±19.40 | 135.60±18.78 | 0.695 | |
| T (μm) | 67.20±8.98 | 74.20±9.17 | 0.002 | |
| N (μm) | 68.51±12.74 | 70.14±11.92 | 0.583 | |
| CMT (ìm) | 246.23±21.24 | 252.69±16.77 | 0.163 | |
| TMV (mm3) | 10.00 (9.90, 10.20) | 10.30 (9.90, 10.50) | 0.005 | |
| MRT (μm) | 277.00 (274.00, 282.00) | 286.00 (276.00, 290.00) | 0.008 | |
| GCL-IPL (μm) | 82.00 (80.00, 85.00) | 84.00 (80.00, 84.00) | 0.046 | |
| OCTA | VLD | |||
| Central | 6.70±3.42 | 9.05±2.59 | 0.002 | |
| Inner | 17.00 (14.70, 18.50) | 18.70 (17.90, 19.00) | <0.001 | |
| Outer | 18.00 (16.90, 18.80) | 18.60 (17.80, 18.80) | 0.138 | |
| Full | 17.40 (15.80, 18.30) | 18.40 (17.40, 18.60) | 0.018 | |
| VPD | ||||
| Central | 0.149±0.079 | 0.204±0.061 | 0.002 | |
| Inner | 0.401 (0.347, 0.442) | 0.447 (0.436, 0.455) | <0.001 | |
| Outer | 0.445 (0.416, 0.466) | 0.462 (0.436, 0.471) | 0.049 | |
| Full | 0.426 (0.385, 0.450) | 0.451 (0.423, 0.459) | 0.007 | |
| FAZ | ||||
| Area (mm2) | 0.312±0.121 | 0.285±0.102 | 0.320 | |
| Perimeter (mm) | 2.365±0.551 | 2.18±0.40 | 0.117 | |
| Circularity | 0.72 (0.58, 0.77) | 0.75 (0.68, 0.78) | 0.037 |
OCT, optical coherence tomography; OCTA, optical coherence tomography angiography; RNFL, retinal nerve fiber layer; S, superior quadrant; I, inferior quadrant; T, temporal quadrant; N, nasal quadrant; CMT, central macular thickness; TMV, total macular volume; MRT, macular retinal thickness; GCL-IPL, ganglion cell-inner plexiform layer complex; VLD, vessel length density; VPD, vessel perfusion density; FAZ, foveal avascular zone.