Table 1 Demographic information for each of the resulting cohorts. χ2 refers to a chi-squared test for equality of proportions. The T-values provided are for independent-samples T-tests. W-values refer to the statistics for Wilcoxon rank sum tests
Unimpaired % or Median (SD) | Impaired (CI) % or Median (SD) | Comparison test | |
|---|---|---|---|
Total N | 331 | 374 | |
Sex (Females) | 65% | 52% | χ2 = 11.58, p < 0.001 |
Ethnicity (Hispanic) | 6% | 11% | χ2 = 4.37, p < 0.05 |
Race (White) | 91% | 79% | χ2 = 21.34, p < 0.0001 |
Age in years | 71.9 (6.8) | 71.2 (6.6) | T = 1.23, p = 0.21 |
Years of education | 16 (2.5) | 16 (2.7) | W = 69.94, p < 0.01 |
MMSE | 29 (1.7) | 27 (2.7) | W = 38.22, p < 0.00001 |
RAVLT Total Score | 8 (2.3) | 4 (3.0) | W = 106.32, p < 0.0001 |
Trails B Duration | 105 (42.3) | 151 (36.7) | T = − 10.37, p < 0.00001 |
PET Aβ Positivity | 23% | 36% | χ2 = 12.91, p < 0.001 |