Table 2.
Intraocular pressure (IOP): mean values, median values, standard deviations, and range in the ExPress and DS-ExPress groups at specific times after surgery.
| Time | ExPress | DS-ExPress | ∗ P | ||||
|---|---|---|---|---|---|---|---|
| Mean ± SD | Median | Range | Mean ± SD | Median | Range | ||
| Pre-op | 17.6 ± 4.7 | 16.50 | 10–28 | 16.3 ± 4.4 | 16.00 | 8–30 | 0.152 |
| 1st day | 7.9 ± 3.8 | 6.50 | 4–18 | 8.6 ± 3.4 | 9.00 | 4–17 | 0.154 |
| 7th day | 8.6 ± 3.2 | 9.50 | 4–16 | 9.3 ± 5.1 | 8.50 | 4–38 | 0.910 |
| 1st month | 14.5 ± 4.4 | 13.50 | 10–30 | 13.1 ± 3.8 | 13.00 | 8–30 | 0.029 |
| 3rd month | 14.0 ± 2.9 | 14.00 | 10–23 | 13.1 ± 3.7 | 12.00 | 6–30 | 0.049 |
| 6th month | 14.6 ± 3.1 | 14.00 | 10–26 | 13.7 ± 3.0 | 13.00 | 10–21 | 0.061 |
| 9th month | 15.2 ± 2.9 | 14.50 | 11–26 | 13.5 ± 3.2 | 13.00 | 9–28 | 0.001 |
| 12th month | 15.4 ± 3.6 | 15.00 | 10–25 | 14.1 ± 2.4 | 14.00 | 10–20 | 0.122 |
| 18th month | 14.8 ± 2.5 | 14.00 | 10–21 | 14.0 ± 2.6 | 14.00 | 8–20 | 0.59 |
| 24th month | 16.0 ± 3.0 | 16.00 | 10–22 | 14.3 ± 3.3 | 13.50 | 9–23 | 0.023 |
ExPress: Ex-Press device implantation group; DS-ExPress: Mermoud's ExPress modification group; SD: standard deviation; pre-op: before operation. ∗Mann–Whitney's U test.