Table 1.
Baseline characteristics
| Characteristic | Total (n = 105) | XEN (n = 47) | NPDS (n = 58) | p-value |
|---|---|---|---|---|
| Age, years, mean ± SD | 72.1 ± 8.7 | 69.3 ± 8.2 | 0.10a | |
| Sex | ||||
| Female | 47 | 21 (45) | 26 (45) | 0.98b |
| Male | 58 | 26 (55) | 32 (55) | |
| First-degree relatives with POAG | 27 | 11 (23) | 16 (28) | 0.63b |
| African ethnicity | ||||
| Yes | 17 | 6 (13) | 11 (19) | 0.39b |
| No | 88 | 41 (87) | 47 (81) | |
| Diabetes | 21 | 8 (17) | 13 (22) | 0.49b |
| Preoperative Humphrey visual field (24–2) | ||||
| MD [dB], mean ± SD | −11.54 ± 8.39 | −15.78 ± 9.50 | 0.04a | |
| PSD [dB], mean ± SD | 7.05 ± 3.53 | 8.00 ± 3.98 | 0.26a | |
| VFI [%], mean ± SD | 66.5 ± 29.68 | 53.31 ± 32.95 | 0.12a | |
| Foveal threshold [dB], mean ± SD | 31.11 ± 6.39 | 28.23 ± 6.35 | 0.16a | |
| Duration of glaucoma, years ± SD | 12.17 ± 8.81 | 10.77 ± 8.55 | 0.62a | |
| Preoperative BCVA, LogMAR ± SD | 0.28 ± 0.16 | 0.36 ± 0.24 | 0.15a | |
| Mean pachymetry, μm ± SD | 521.8 ± 31.4 | 518 ± 47.21 | 0.67a | |
| Cup-to-disc ratio ± SD | 0.80 ± 0.18 | 0.85 ± 0.16 | 0.21a | |
| Disease type | ||||
|
POAG Pigment dispersion PEXG NTG High myopia Cortisone-induced |
77 (73) 3 (3) 16 (15) 1 (1) 3 (3) 5 (5) |
34 (73) 2 (4) 8 (17) 1 (2) 0 (0) 2 (4) |
43 (74) 1 (2) 8 (14) 0 (0) 3 (5) 3 (5) |
0.71b |
| Antiglaucoma medication, mean ± SD | 2.66 ± 1.07 | 2.93 ± 0.88 | 0.16a | |
| Preoperative SLT | 14 (30) | 28 (48) | 0.1b | |
| Preoperative acetazolamide tablet, mean ± SD | 0.86 ± 1.24 | 0.66 ± 1.04 | 0.38a | |
The results are displayed as n (%) for categorical variables
SD standard deviation, NPDS nonpenetrating deep sclerectomy, HFA Humphrey visual field analyzer, MD mean deviation, PSD pattern standard deviation, VFI visual field index, BCVA best corrected visual acuity, POAG primary open-angle glaucoma, PEXG pseudoexfoliative glaucoma, NTG normal-tension glaucoma, SLT selective laser trabeculoplasty
a Student t-test
b chi-squared test