Table 4.
Vessel distribution of the four patient groups.
| Vessel distribution (mean ± SD) | OAG group | NTG group | OHT group | Control group | P value |
|---|---|---|---|---|---|
| Total superficial vessel density (%) | 41.66 ± 5.18 | 43.25 ± 5.50 | 46.39 ± 4.71 | 48.97 ± 3.12 | <0.01a |
| Total deep vessel density (%) | 46.46 ± 3.92 | 41.44 ± 9.97 | 48.19 ± 6.40 | 50.42 ± 8.11 | <0.01b |
| Foveal avascular zone (mm2) | 0.37 ± 0.13 | 0.45 ± 0.21 | 0.25 ± 0.12 | 0.27 ± 0.12 | <0.01c |
| Flow area of the outer retina (mm2) | 0.91 ± 0.31 | 1.12 ± 0.19 | 1.19 ± 0.18 | 1.33 ± 0.28 | <0.01d |
| Flow area of the choriocapillaris (mm2) | 1.95 ± 0.19 | 1.64 ± 0.49 | 1.78 ± 0.12 | 1.78 ± 0.18 | 0.05 |
OAG: open-angle glaucoma, NTG: normal-tension glaucoma, OHT: ocular hypertension, and SD: standard deviation. aSignificant difference of both the OAG and NTG groups compared to the control group. bSignificant difference between the NTG and control groups. cSignificant difference between the NTG and OHT groups. dSignificant difference of the OAG group relative to both the OHT and control groups.