Table 1.
Demographic characteristics of Duff’s (2014) test development and the current validation samples
| Duff (2014) | Current validation sample | |
|---|---|---|
| Variable | Mean (SD) | Mean (SD) |
| n | 167 | 143 |
| Cognitively intact | 93 | 0 |
| Mild cognitive impairment | 74 | 143 |
| Age (years) | 78.6 (7.8) | 75.5 (6.1) |
| Education (years) | 15.4 (2.5) | 16.2 (2.9) |
| Gender (% female) | 81.1% | 50.3% |
| Race (n) | ||
| African American | 0 | 1 |
| Hispanic/Latino American | 0 | 1 |
| Native American | 0 | 1 |
| White, non-Hispanic | 167 | 140 |
| Test interval (days) | 7.6 (2.2) | 7.2 (0.9) |
| WRAT-3 or -4 premorbid intellect | 107.8 (6.2) | 108.2 (8.8) |
| RBANS indexes (SS) | ||
| Immediate memory | 99.8 (15.4) | 81.9 (16.7) |
| Visuospatial/constructional | 106.5 (15.1) | 97.7 (15.5) |
| Language | 101.4 (11.9) | 90.9 (12.3) |
| Attention | 102.8 (14.9) | 96.1 (15.2) |
| Delayed memory | 100.1 (13.9) | 77.7 (21.0) |
| Total scale | 102.8 (13.3) | 85.1 (13.2) |
Note: SD = standard deviation; WRAT-3 or -4 premorbid intellect = Wide Range Achievement Test—third or fourth edition Reading Subtest; RBANS = Repeatable Battery for the Assessment of Neuropsychological Status; SS = Standard Score.