Table 1.
Demographic characteristics of sample.
| Groups | Control | CIND | AD | Statistical analysis | |
|---|---|---|---|---|---|
| Age | Mean | 72.41 | 71.84 | 80.07#,+ | *χ2=27.344 |
| (SD) | (8.16) | (9.25) | (8.84) | p<0.001 | |
| Education | Mean | 643 | 3.71** | 3.36# | *χ2=22.583 |
| (SD) | (5.01) | (4.74) | (4.49) | p<0.001 | |
| Sex | Male | 24 | 9 | 14 | χ2=1.757 |
| (%) | (30.45%) | (36.0%) | (23.0%) | p>0.05 | |
SD: Standard Deviation;
*
Kruskal-Wallis test among three groups;
**
Mann-Whitney – controls versus CIND: U=522.500, p: 0.002;
#
Mann-Whitney – controls versus AD: age (U=1254,000; p<0,001) and education (U=1140.500; p<0.001);
+
Mann-Whitney – CIND versus AD: U=375.500, p<0.001