Logistic regression analysis of prognostic variables
| Preoperative variable | OR (SE) | P value | 95% CI |
| For improvement in visual acuity | |||
| Presence of disc pallor | 1.5 (2.1) | 0.7 | 0.11 to 21.5 |
| Preoperative VFI | 0.9 (0.02) | 0.5 | 0.9 to 1.02 |
| Average RNFL thickness | 0.9 (0.03) | 0.8 | 0.9 to 1.1 |
| For improvement in visual field | |||
| Presence of disc pallor | 8.8 (11.3) | 0.08 | 0.7 to 109.1 |
| Average RNFL thickness | 1.1 (0.02) | 0.006* | 0.01 to 1.1 |
*P<0.05.
RNFL, retinal nerve fibre layer; VFI, visual field index.