Table 1.
The mean actual volume, the mean actual number of drops, the mean volume per drop, and the number of usage days per bottle of glaucoma fixed combinations.
| Drug | Labeled volume/bottle (ml) | Actual mean volume/bottle (ml) | No. of drops/bottle (95% CI) | Volume/drop (μl) (95% CI) |
|---|---|---|---|---|
| Azarga | 5.0 | 4.71 ± 0.06 | 178.2 ± 3.19 (174.23–182.17) | 26.45 ± 0.41 (25.93–26.96) |
| DuoTrav | 2.5 | 2.33 ± 0.08 | 71.8 ± 4.15 (66.65–76.95) | 32.61 ± 2.90 (29.01–36.22) |
| Ganfort | 3.0 | 2.98 ± 0.02 | 122.4 ± 0.55 (121.72–123.08) | 24.38 ± 0.23 (24.09–24.67) |
| Xalacom | 2.5 | 2.62 ± 0.03 | 96.4 ± 2.40 (93.05–99.75) | 27.22 ± 0.87 (26.13–28.30) |
95% CI: 95% confidential interval.