Table 1. Demographic and performance variables.
| Young (n = 32) | Old (n = 27) | DAT (n = 23) | |
|---|---|---|---|
| Female/male | 15/17 | 17/10 | 8/15 |
| Age* | 22.0 (0.6) | 76.1 (1.7) | 77.0 (1.3) |
| Education, yr | 15.4 (0.6) | 14.2 (0.6) | |
| MMSE† | 29.0 (0.2) | 26.0 (0.7) | |
| WAIS information† | 21.0 (0.9) | 17.6 (1.1) | |
| WAIS block design† | 32.3 (1.8) | 25.6 (2.1) | |
| WAIS digit symbol† | 47.3 (2.1) | 36.3 (2.6) | |
| Boston naming† | 56.1 (0.7) | 50.7 (1.4) | |
| Word fluency (S + P)† | 32.9 (2.0) | 25.8 (2.0) | |
| WMS mental control† | 7.6 (0.3) | 6.5 (0.4) | |
| WMS digit span (backward)† | 5.0 (0.2) | 4.1 (0.2) | |
| WMS logical memory† | 9.8 (0.9) | 6.4 (0.6) | |
| Reaction time, ms* | 934.5 (20.6) | 1,081.9 (32.4) | 1,159.0 (33.4) |
| Classification accuracy, %, *† | 90.0 (0.5) | 85.4 (1.6) | 80.3 (2.0) |
| Corrected recognition, %, *† | 78.0 (2.2) | 62.5 (3.6) | 31.2 (5.2) |
Means and standard errors (in parentheses) for demographic and performance variables. MMSE, Mini Mental State Evaluation; WAIS, Wechsler Adult Intelligence Scale; WMS, Wechsler Memory Scale. Variables with values for all three groups were analyzed by using one-way ANOVA followed by post hoc t tests. Variables with values only for the older adult groups were analyzed by using independent sample t tests. *, significant difference between young and old without dementia; †, significant difference between old without dementia and old with DAT, P < 0.05.