Figure 2.

(a) Mini mental state examination score of memantine versus placebo group. In memantine group, mini mental state examination score increased, which is statistically significant at the 4^th and 8^th week follow-up, and highly significant at the 12^th and 16^th follow-up week in comparison with the placebo *P<0.05, **P<0.01, ***P<0.001. (b) Weshler's Memory Scale score of memantine versus placebo group. In memantine group, Weshler's Memory Scale score increased, which is statistically significant at the 8^th week follow-up, and highly significant at the 12^th and 16^th follow-up week in comparison with the placebo. **P<0.01, ***P<0.001