We conducted all statistical analysis using the SPSS 12.0 software for Windows. The Mann-Whitney test (U) was performed to compare mean rates of variation between the two patient groups. The analyzed variables were: age, duration of dementia, MMSE scores, Functional Scale of Pfeffer’s scores, level of education in years, Clinical Dementia Rating Scale and BFI rate. We established the confidence interval as 95% for the statistical tests.