Table 1 Patient demographics and baseline ocular characteristics
| Â | the first GDI group | the second GDI group | P-value |
|---|---|---|---|
No. of eyes (patients) | 136 (109) | 32 (27) | Â |
Age at surgery (mean ± SD years) | 61.0 ± 11.2 | 60.5 ± 11.4 | 1.00 |
Age at diagnosis: <40 years:〈n, (%)〉 | 36 (27.7%) | 12 (41.4%) | 0.22 |
Family history: yes:〈n, (%)〉 | 46 (34.3%) | 13 (40.6%) | 0.64 |
Gender: male〈n, (%)〉 | 98 (72.1%) | 30 (93.8%) | 0.01 |
Operated eye: right〈n, (%)〉 | 64 (47.1%) | 13 (40.6%) | 0.64 |
Previous glaucoma surgeries | Â | Â | Â |
 TLO (mean ± SD) | 0.2 ± 0.6 | 0.2 ± 0.5 | 0.65 |
 TRAB (mean ± SD) | 1.1 ± 1.0 | 1.6 ± 1.2 | 0.01 |
Lens status: phakic〈n, (%)〉 | 50 (37.0%) | 12 (37.5%) | 1.00 |
Preoperative data | Â | Â | Â |
 IOP (mmHg) (mean ± SD) | 26.7 ± 6.7 | 23.7 ± 3.5 | 0.09 |
 Glaucoma medication score (mean ± SD) | 3.9 ± 1.4 | 3.9 ± 1.1 | 0.68 |
 BCVA (mean ± SD) | 0.7 ± 0.4 | 0.6 ± 0.5 | 0.55 |
 VF (mean ± SD) | 4.0 ± 1.5 | 4.2 ± 1.5 | 0.57 |
Type of GDI〈n, (%)〉 |  |  | 0.22 |
 BGI250 | 49 (36.0%) | 16 (50.0%) |  |
 BGI350 | 71 (52.2%) | 15 (46.9%) |  |
Double-Plate Molteno Implant | 16 (11.8%) | 1 (3.1%) | Â |
Location of the plate〈n, (%)〉 |  |  | < 0.01 |
 Temporal upper | 7 (5.7%) | 18 (56.3%) |  |
 Temporal lower | 108 (88.5%) | 3 (9.4%) |  |
 Nasal lower | 5 (4.1%) | 1 (3.1%) |  |
 Nasal upper | 2 (1.6%) | 10 (31.3%) |  |
Ligation site: in the anterior chamber〈n, (%)〉 | 72 (55.3%) | 17(53.1%) | 0.97 |