TABLE 1.
Demographic characteristics (mean, SD/n, %) and mean (SD) cognitive measures for n = 118 cognitively unimpaired older adults
| Age (years) | 76.29 (5.68), range 65 to 91 |
| Sex | |
| Male | 50 (42.4%) |
| Female | 68 (57.63%) |
| Race | |
| White/Caucasian | 97 (82.2%) |
| African American | 19 (16.1%) |
| Other | 2 (1.6%) |
| Education | |
| High school or L = less | 30 (25.6%) |
| Some college | 29 (24.8%) |
| 4‐year college | 22 (18.8%) |
| Greater than college | 36 (30.8%) |
| Traditional neuropsychological tests (raw scores) | |
| MMSE (30 points) | 28.3 (1.5) |
| Logical Memory IR (Story A, 25 points) | 14.16 (3.77) |
| Logical Memory DR (Story A, 25 points) | 12.77 (3.82) |
| Semantic fluency (animals), # words per minute | 19.62 (5.08) |
| Trail Making A, connections per second | 0.76 (0.24) |
| Trail Making B, connections per second | 0.32 (0.12) |
| Clock drawing (15 points) | 14.23 (0.88) |
| Processing speed composite scorea (0 to 100) | 56.11 (16.75) |
| Global composite scoreb (0 to 100) | 66.69 (9.75) |
| NIH Toolbox Cognition, uncorrected standard scores | |
| Total cognition composite | 97.68 (9.38) |
| Fluid cognition composite | 86.09 (10.26) |
| Crystallized cognition composite | 111.28 (7.68) |
| Picture Vocabulary Test | 112.7 (8.8) |
| Flanker Inhibitory Control and Attention Test | 89.08 (9.22) |
| List Sorting Working Memory Test | 95.19 (10.88) |
| Dimensional Change Card Sort Test | 96.04 (7.37) |
| Pattern Comparison Processing Speed Test | 80.63 (14.62) |
| Picture Sequence Memory Test | 93.32 (11.94) |
| Oral Reading Recognition Test | 109.08 (6.73) |
Notes: NIH Toolbox Cognition Battery uncorrected standard scores have a mean of 100 and SD of 15.
CDR = Clinical Dementia Rating scale; DR = delayed recall; IR = immediate recall; MMSE = Mini Mental State Exam.
a
Component measures = Trail Making Tests A and B, semantic fluency.
b
Component measures = all traditional NP tests.