As of 2003 only three controlled clinical trials had tested "older adults with memory problems", and these studies had promising results, in which a 2003 Cochrane review decided that the results were inconclusive.
Three controlled clinical trials had tested "older adults with memory problems". This was as of 2003 only. These studies had promising results. The results were inconclusive in promising results. A 2003 Cochrane review decided this.