2.4. Statistical Analysis
NDC, dementia
The recorded data did not show a normal distribution shape (asymmetry and kurtosis calculations). For this reason, and since the groups were small, nonparametric statistics were used. The comparisons between the EG (DC and NDC) and CG (DC and NDC) were carried out by means of Fisher’s test for dementia etiology and sex (2 × 2 contingency table), and with the chi-squared test for the dementia severity level (4 × 3 contingency table). All of the other comparisons between the four groups were performed using the Kruskal–Wallis test. When a statistically significant difference was found, a post hoc test was conducted with the Mann–Whitney U test and Bonferroni correction (