Preoperative patient demographics
| Characteristic | Trabeculectomy (n = 25) | Viscocanalostomy (n = 25) |
|---|---|---|
| Age (years) | 59 (range 20–79) | 61 (range 28–80) |
| Sex (male:female) | 18:7 | 17:8 |
| Race: | ||
| White | 8 | 8 |
| Afro-Caribbean/African | 14 | 15 |
| Indian Subcontinent | 3 | 2 |
| Preoperative glaucoma medications | 3 (range 2–5) | 2.87 (range 1–4) |
| Risk factors for failure score (table 2) | 9.1 (range 3–16) | 8.9 (range (3–16) |
| Type of OAG: | ||
| Primary | 24 | 23 |
| Secondary | 1 | 2 |
| Preoperative IOP (mm Hg) | 27.9 (range 19–50) | 25.7 (18–44) |