Table 3.
Multivariate analysis for determining prognostic factors for the single bleb layer using the Logistic regression model
| Variable | RR (95% Cl) | P value |
|---|---|---|
| Number of previous intraocular surgeries per each | 2.85 (1.46–6.67) | 0.0014 |
| Preoperative IOP per mmHg | 0.96 (0.87–1.03) | 0.26 |
| Age per year | 0.99 (0.92–1.07) | 0.80 |
| Type of glaucoma (open-angle glaucoma/other) | 1.23 (0.22–7.07) | 0.81 |
| Axial length per mm | 0.85 (0.62–1.14) | 0.27 |
| Preoperative glaucoma medication per each | 0.77 (0.36–1.55) | 0.47 |
| Postoperative glaucoma medication per each | 0.90 (0.57–1.42) | 0.65 |
| Period between surgery and MRI per month | 1.05 (0.97–1.13) | 0.24 |
| Tube insertion position (anterior chamber/pars plana) | 3.39 (0.31–47.2) | 0.32 |
| Endplate position (superotemporal/other) | 1.01 (0.21–4.88) | 0.99 |
IOP, intraocular pressure; MRI, magnetic resonance imaging; RR, relative risk. Open-angle glaucoma includes primary open-angle glaucoma and exfoliation glaucoma.