Ginkgo biloba extract v placebo in mild to moderate Alzheimer's disease
| Outcome at mean follow up of 19 weeks | Weighted mean difference | Controls with a worse outcome than treated* |
|---|---|---|
| *The proportion of control patients with a worse outcome than the average treated patient; calculated from data in article. | ||
| Cognitive function | 0.41 (0.22 to 0.61) | 66% (59 to 73) |