Statistical results of relationship between vertical cup-to-disc ratio and several explanatory valuables in general linear mixed-model analysis after adjusting for age, sex, optic disc area, systolic blood pressure, diastolic blood pressure, body mass index, central corneal thickness and previous cataract surgery
| Explanatory variables | F value | P value | β (SE) |
| Basal ganglia lesion | 3.95 | 0.0193 | |
| Grade 0 | −0.0653 (0.0251) | ||
| Grade I | −0.0419 (0.0301) | ||
| Grade II | Reference | ||
| Intraocular pressure | 24.25 | <0.0001 | 0.0071 (0.0014) |