Demographic profile and baseline characteristics of two groups
| AGV n (%) | AADI n (%) | P value | |
| Number of patients | 173 | 201 | |
| Number of eyes | 189 | 206 | |
| Age | 52.68±16.84 | 47.82±16.79 | <0.01 |
| Sex (male:female) | 135:54 | 145:61 | 0.83 |
| Laterality (right:left) | 95:94 | 98:108 | 0.62 |
| Mean cup disc ratio | 0.76±0.19 | 0.76±0.15 | 0.18 |
| Mean visual acuity (logMar) | 0.62±0.26 | 0.68±0.22 | 0.03 |
| Mean IOP | 30.15±11.31 | 29.97±11.03 | 0.85 |
| Preoperative AGM | |||
| Mean combined AGM | 4.06±1.21 | 4.52±0.99 | <0.01 |
| Mean topical AGM | 3.12±1.09 | 3.38±0.85 | 0.02 |
| Mean oral AGM | 0.94±0.39 | 1.17±0.56 | <0.01 |
| Failed GFS | 42 | 57 | 0.58 |
| Lens status | |||
| Phakic | 70 (37.04) | 85 (41.26) | 0.41 |
| Pseudophakic | 101 (53.44) | 99 (48.06) | 0.31 |
| Aphakic | 18 (9.52) | 22 (10.68) | 0.74 |
| Aetiology | |||
| Secondary glaucoma | |||
| Post-penetrating keratoplasty | 18 (9.52%) | 32 (15.53%) | 0.09 |
| NVG | 20 (10.58%) | 31 (15.05%) | 0.23 |
| Trauma | 12 (6.35%) | 27 (13.11%) | 0.03 |
| Post-PPV | 40 (21.16%) | 21 (10.19%) | < 0.01 |
| Uveitic | 8 (4.23%) | 16 (7.77%) | 0.21 |
| Pseudophakic glaucoma | 7 (3.70%) | 8 (3.88%) | 1.00 |
| ICE | 6 (3.17%) | 6 (2.91%) | 1.00 |
| PBK | 5 (2.65%) | 6 (2.91%) | 1.00 |
| Lens induced | 2 (1.06%) | 4 (1.94%) | 0.69 |
| Steroid | 6 (3.17%) | 2 (0.97%) | 0.16 |
| Malignant | 1 (0.53%) | 1 (0.49%) | 1.00 |
| Primary glaucoma | |||
| POAG | 44 (23.28%) | 30 (14.56%) | 0.03 |
| PACG | 18 (9.52%) | 11 (5.34%) | 0.13 |
| Childhood glaucoma | |||
| JOAG | 1 (0.53%) | 6 (2.91%) | 0.12 |
| PCG/developmental | 1 (0.53%) | 5 (2.43%) | 0.22 |
AADI, aurolab aqueous drainage implant; AGM, antiglaucoma medication; AGV, Ahmed glaucoma valve; GFS, glaucoma filtration surgery; ICE, iridocorneal endothelial syndrome; IOP, intraocular pressure; JOAG, juvenile open-angle glaucoma; NVG, neovascular glaucoma; PACG, primary angle-closure glaucoma; PBK, pseudophakic bullous keratopathy; PCG, primary congenital glaucoma; POAG, primary open-angle glaucoma; PPV, pars plana vitrectomy; logMar, logarithm of the minimum angle of resolution.