Success rate at 1 year follow up
| Age group | Total | Success ⩽21 mm Hg (no treatment) | Relative success ⩽21 mm Hg (with treatment) | Failure >21 mm Hg |
|---|---|---|---|---|
| 45–50 | 16 | 12 (75%) | 3 (18.8%) | 1 (6.2%) |
| 51–55 | 21 | 18 (85.7%) | 3 (14.3%) | 0 |
| 56–60 | 25 | 18 (72.0%) | 5 (20.0%) | 2 (8.0%) |
| 61–65 | 36 | 28 (77.8%) | 5 (13.9%) | 3 (8.3%) |
| 66–70 | 28 | 21 (75.0%) | 5 (17.9%) | 2 (7.1%) |
| 71–75 | 27 | 20 (74.1%) | 6 (22.2%) | 1 (3.7%) |
| 76–80 | 30 | 26 (86.7%) | 4 (13.3%) | 0 |
| 81–85 | 24 | 20 (83.3%) | 3 (12.5%) | 1 (4.2%) |
| All ages | 207 | 163 (78.7%) | 34 (16.4%) | 10 (4.8%) |