Mean number of letters correctly identified during contrast sensitivity and visual acuity testing
| Baseline | 30 minutes | 90 minutes | p Value (ANOVA) | ||
|---|---|---|---|---|---|
| Contrast sensitivity | Placebo | 31.8 (6.6) | 31.6 (7.5) | 31.4 (7.31) | 0.83 |
| Niacin | 32.4 (5.9) | 31.8 (5.3) | 31.8 (6.0) | ||
| Visual acuity | Placebo | 50.6 (10.4) | 49.4 (10.3) | 49.0 (12.6) | 0.89 |
| Niacin | 51.5 (10.8) | 49.8 (11.8) | 49.3 (13.3) | ||