Table 2.
Success rates at different time points
| Success | 1 year
|
2 years
|
3 years
|
4 years
|
||||
|---|---|---|---|---|---|---|---|---|
| POAG (n=20) | UG (n=22) | POAG (n=20) | UG (n=22) | POAG (n=20) | UG (n=22) | POAG (n=13) | UG (n=15) | |
| Complete success | ||||||||
| ≤21 mmHg, n (%) | 4 (20) | 4 (18) | 5 (25) | 3 (14) | 4 (20) | 5 (23) | 2 (15) | 2 (13) |
| P-value | 1.0 | 0.44 | 1.0 | 1.0 | ||||
| ≤21 mmHg and ≥25% IOP reduction from baseline, n (%) | 4 (20) | 4 (18) | 2 (10) | 3 (14) | 2 (10) | 5 (23) | 1 (8) | 3 (20) |
| P-value | 1.0 | 1.0 | 0.44 | 0.6 | ||||
| Qualified success | ||||||||
| ≤21 mmHg, n (%) | 16 (80) | 11 (50) | 15 (75) | 12 (55) | 16 (80) | 10 (45) | 11 (85) | 6 (40) |
| P-value | 0.02 | 0.12 | 0.03 | 0.03 | ||||
| ≤21 mmHg and ≥25% IOP reduction from baseline, n (%) | 12 (60) | 8 (36) | 15 (75) | 9 (41) | 14 (70) | 7 (32) | 8 (62) | 4 (27) |
| P-value | 0.2 | 0.03 | 0.03 | 0.12 | ||||
| Failure | ||||||||
| n (%) | None | 7 (32) | None | 7 (32) | None | 7 (32) | None | 7 (47) |
Notes: Success was defined as IOP ≤21 mmHg (success 1) and IOP ≤21 mmHg and at least 25% reduction from baseline (success 2). Complete success was achieved when no further glaucoma medication was required after glaucoma surgery. If glaucoma medication or a cycloablative procedure was necessary to control IOP, then success was qualified. If the IOP was >21 mmHg at two consecutive visits despite reintroduction of glaucoma medications and further surgical treatment such as filtering surgery or the implantation of Ahmed glaucoma valve was necessary to control IOP, then these eyes were considered as failure. Statistically significant changes are shown in bold.
Abbreviations: POAG, primary open-angle glaucoma; UG, uveitic glaucoma; IOP, intraocular pressure.