Table 1.
Preoperative characteristics of patients
| Drainage implant (N = 20) | Trabeculectomy (N = 20) | P value | |
|---|---|---|---|
| Age (y) | |||
| Mean ± SD | 54. 0 ± 15.6 | 59.65 ± 15.8 | 0.342 |
| Range | 27–88 | 29–88 | |
| Gender (male:female) | 9:11 | 10:10 | 0.752 |
| Race (AA:C) | 16:4 | 14:6 | 0.465 |
| Eye (OD:OS) | 12:8 | 11:9 | 0.749 |
| Lens status | 0.197 | ||
| Phakic | 10 | 12 | |
| Pseudophakic | 3 | 0 | |
| Aphakic | 7 | 8 | |
| Preoperative Avastin | |||
| Yes | 1 | 2 | 0.549 |
| No | 19 | 18 | |
| Preoperative PRP | |||
| Yes | 18 | 17 | 0.632 |
| No | 2 | 3 | |
| Previous glaucoma surgery | |||
| Yes | 1 | 0 | 0.311 |
| No | 19 | 20 | |
| Primary open-angle glaucoma | |||
| Yes | 7 | 7 | 1.00 |
| No | 13 | 13 | |
| Etiology of neovascular glaucoma | |||
| PDR | 14 | 13 | |
| CRVO | 3 | 4 | 0.981 |
| CRAO | 2 | 2 | |
| OIS | 1 | 1 | |
| Gonioscopy | |||
| Open | 3 | 4 | |
| 90° closed | 0 | 1 | 0.446 |
| 180° closed | 4 | 2 | |
| 270° closed | 0 | 2 | |
| 360° closed | 11 | 11 | |
| Preoperative acuity (logMAR, mean ± SD) | 2.11 ± 0.62 | 1.88 ± 0.65 | 0.314 |
| Preoperative intraocular pressure (mm Hg, mean ± SD) | 47.7 ± 10.2 | 47.8 ± 11.3 | 0.926 |
| Preoperative medications (mean ± SD) | 3.4 ± 1.2 | 3.6 ± 1.1 | 0.603 |
Abbreviations: AA, African American; C, Caucasian; CRAO, central retinal artery occlusion; CRVO, central retinal vein occlusion; logMAR, logarithm of the minimal angle of resolution; OD, right eye; OIS, ocular ischemic syndrome; OS, left eye; PDR, proliferative diabetic retinopathy; PRP, panretinal photocoagulation; SD, standard deviation.