Table 4.
Summary of Previous Interventions at Baseline in the Ahmed Baerveldt Comparison Study
| Overall Group (n = 276 ) |
AGV (n =143 ) |
BGI (n = 133) |
P-value | |
|---|---|---|---|---|
| Lens status, n (%) | 0.50d | |||
| Phakic | 91 (33%) | 47 (33%) | 44 (33%) | |
| PCIOL | 169 (61%) | 90 (63%) | 79 (59%) | |
| ACIOL | 11 (4 %) | 5 (4%) | 6 (5%) | |
| Aphakic | 5 (2%) | 1 (1%) | 4 (3%) | |
| Previous laser therapy, n (%) | ||||
| None | 141 (51%) | 70 (49%) | 71 (53%) | 0.47a |
| Laser trabeculoplasty | 47 (17%) | 27 (19%) | 20 (15%) | 0.42a |
| Laser iridotomy | 25 (9%) | 15 (11%) | 10 (8 %) | 0.41a |
| Other laser procedures | 74 (27%) | 41 (29%) | 33 (25%) | 0.50a |
| Previoius incisional surgery | ||||
| None | 54 (20%) | 28 (20%) | 26 (20%) | 1.00a |
| Cataract | 152 (55%) | 79 (55%) | 73 (55%) | 1.00a |
| Trabeculectomy | 83 (30%) | 42 (29%) | 41 (31%) | 0.80a |
| Combined Cataract and trabeculectomy |
32 (12%) | 16 (11%) | 16 (12%) | 0.85a |
| Other | 60 (22%) | 31 (22%) | 29 (22%) | 1.00a |
a
Fisher Exact test
b
Mann-Whitney test
c
t-test
d
Chi-squared test
AGV = Ahmed Glaucoma Valve,; BGI = Baerveldt Glaucoma Implant; PCIOL = Posterior Chamber Intraocular Lens Implant; ACIOL = Anterior Chamber Lens Implant