Table 3.
Summary of Ocular Characteristics at Baseline in the Ahmed Baerveldt Comparison Study
| Overall Group (n = 276 ) |
AGV (n =143 ) |
BGI (n = 133) |
P-value | |
|---|---|---|---|---|
| Study eye, n (%) | ||||
| Right | 148 (54%) | 83 (58%) | 65 (49%) | 0.15a |
| Snellen Visual Acuity | ||||
| Median | 20/80 | 20/80 | 20/70 | 0.78b |
| Range | 20/15, LP | 20/15, LP | 20/15, LP | |
| IOP (mm Hg) | ||||
| Mean ± SD | 31.5 ± 11.8 | 31.2±11.2 | 31.8 ± 12.5 | 0.71c |
| Range | 16, 78.5 | 18, 67 | 16, 78.5 | |
| Number of classes of glaucoma medications, n (%) |
0.40d | |||
| 0 | 4 (1%) | 4 (3%) | 0 (0%) | |
| 1 | 10 (4%) | 4 (3%) | 6 (5%) | |
| 2 | 32 (12%) | 17 (12%) | 15 (11%) | |
| 3 | 91 (33%) | 48 (34%) | 43 (32%) | |
| 4 | 99 (36%) | 52 (36%) | 47 (35%) | |
| ≥ 5 | 40 (15%) | 18 (13%) | 22 (17%) | |
| Mean ± SD | 3.4±1.1 | 3.4 ± 1.1 | 3.5 ± 1.1 | 0.34c |
| Central Corneal thickness | ||||
| Mean ± SD | 551.1±55.6 | 552.0±60.5 | 550.2 ± 50.0 | 0.79c |
| Range | 417, 984 | 434, 984 | 417, 675 | |
| Diagnosis, n (%) | 0.88d | |||
| POAG | 111 (40%) | 58 (41%) | 53 (40%) | |
| PACG | 18 (7%) | 10 (7%) | 8 (6%) | |
| Neovascular | 80 (29%) | 41(29%) | 39 (29%) | |
| Uveitic | 18 (7%) | 11 (8%) | 7 (5%) | |
| Other | 49 (18%) | 23 (16%) | 26 (20%) | |
| VA < 20/30, n (%) | 198 (72%) | 101 (71%) | 97 (73%) | 0.69a |
| Reason for VA < 20/30, n (%) | ||||
| Glaucoma | 133 (67%) | 63 (62%) | 70 (72%) | 0.094a |
| Macular disease | 45 (23%) | 26 (26%) | 19 (20%) | 0.32a |
| Cataract | 21 (11%) | 13 (13%) | 8 (8%) | 0.36a |
| Other | 66 (33%) | 31 (31%) | 35 (36%) | 0.45a |
| Unknown | 2 (1%) | 0 | 2 (2%) | 0.24a |
a
Fisher Exact test
b
Mann-Whitney test
c
t-test
d
Chi-squared test
AGV = Ahmed Glaucoma Valve,; BGI = Baerveldt Glaucoma Implant; LP = Light perception; IOP = Intraocular Pressure; SD = Standard Deviation; POAG = Primary Open Angle Glaucoma; PACG = Primary Angle Closure Glaucoma; VA = Visual Acuity.