Table 2.
Success
| Trabeculectomy | Canaloplasty | p‐Valuea | |
|---|---|---|---|
| Complete successb | |||
| IOP ≤21 mmHg and ≥20% IOP reduction | |||
| 1 month | 26/32 (81.2) | 15/29 (51.7) | 0.04 |
| 3 months | 27/32 (84.4) | 16/26 (61.5) | |
| 6 months | 25/32 (78.1) | 13/24 (54.2) | |
| 12 months | 24/31 (77.4) | 14/23 (60.9) | |
| 24 months | 21/31 (67.7) | 9/23 (39.1) | |
| IOP ≤18 mmHg | |||
| 1 month | 29/32 (90.6) | 16/29 (55.2) | 0.01 |
| 3 months | 27/32 (84.4) | 16/26 (59.3) | |
| 6 months | 25/32 (78.1) | 14/24 (58.3) | |
| 12 months | 24/31 (77.4) | 13/23 (56.5) | |
| 24 months | 23/31 (74.2) | 9/23 (39.1) | |
| Qualified successc | |||
| IOP ≤21 mmHg and ≥20% IOP reduction | |||
| 1 month | 26/32 (81.2) | 21/29 (72.4) | 0.40 |
| 3 months | 30/32 (93.8) | 25/26 (96.2) | |
| 6 months | 29/32 (90.6) | 20/24 (83.3) | |
| 12 months | 30/31 (96.8) | 23/23 (100) | |
| 24 months | 28/31 (90.3) | 19/23 (82.6) | |
| IOP ≤18 mmHg | |||
| 1 month | 29/32 (90.6) | 22/29 (75.9) | 0.01 |
| 3 months | 31/32 (96.6) | 24/26 (88.9) | |
| 6 months | 31/32 (96.9) | 23/24 (95.8) | |
| 12 months | 31/31 (100) | 22/23 (95.7) | |
| 24 months | 30/31 (96.8) | 19/23 (82.6) | |
IOP = intraocular pressure.
Data are absolute values (%).
Success was defined as an IOP of ≤18 mmHg (definition 1) or IOP‐reduction by ≥20% and to ≤21 mmHg (definition 2) without medication (complete success) and irrespective of medication (qualified success) after 4 weeks postoperatively, IOP ≥5 mmHg after 4 weeks, no loss of light perception attributable to glaucoma, eyes not requiring subsequent glaucoma surgery (e. g. photocoagulation of ciliary body) and a completed follow‐up until 2 years postoperatively.
Number of patients with success varies during follow‐up. Success rate can be higher later on as patients can fulfil success criteria again after adding topical treatment (see qualified success with or without medication).
Log‐rank test.
Without glaucoma medication.
With or without glaucoma medication.