Table 2.
Comparison of patient data between the single bleb layer and double bleb layer groups
| Single bleb layer (n = 28) | Double bleb layer (n = 24) | P value | |
|---|---|---|---|
| Bleb volume, mean (SD), cm3 | 0.19 (0.1) | 0.28 (0.2) | 0.024 |
| Age, mean (SD), years | 69.1 (2.0) | 71.0 (11.2) | 0.53 |
| Preoperative IOP, mean (SD), mmHg | 30.9 (8.3) | 31.4 (11.4) | 0.79 |
| Number of preoperative glaucoma medications, mean (SD), n | 3.4 (1.1) | 3.5 (0.8) | 0.94 |
| Postoperative IOP, mean (SD), mmHg | 14.7 (4.1) | 12.3 (3.8) | 0.033 |
| Number of postoperative glaucoma medications, mean (SD), n | 1.5 (1.8) | 1.6 (1.8) | 0.87 |
| Axial length, mean (SD), mm | 25.2 (3.2) | 24.9 (2.6) | 0.80 |
| Period between surgery and MRI, mean (SD), months | 16.3 (11.1) | 13.8 (8.9) | 0.42 |
| Number of previous intraocular surgeries, mean (SD), n | 2.8 (1.4) | 1.9 (0.8) | 0.0068 |
| Type of glaucoma, n (%) | 1.00 | ||
| Open-angle glaucoma | 16 (57.1) | 14 (58.3) | |
| Other glaucoma types | 12 (42.9) | 10 (41.7) | |
| Tube insertion position, n (%) | 0.48 | ||
| Anterior chamber | 22 (78.6) | 21 (87.5) | |
| Pars plana | 6 (21.4) | 3 (12.5) | |
| Endplate position, n (%) | 1.00 | ||
| Superotemporal | 22 (78.6) | 18 (75.0) | |
| Other | 6 (21.4) | 6 (25.0) |
IOP, intraocular pressure; MRI, magnetic resonance imaging; SD, standard deviation. Open-angle glaucoma includes primary open-angle glaucoma and exfoliation glaucoma.