Table 1. Demographic and cognitive characteristics (n=5,949).
| Baseline | Follow-up | |||
|---|---|---|---|---|
| Variables | Mean | SD | Mean | SD |
| CERAD WLT Learning z-score | -0.07 | 1.01 | 0.04 | 1.02 |
| CERAD WLT Recall | -0.07 | 1.01 | 0.07 | 1.01 |
| CERAD WLT Recognition | -0.06 | 1.04 | 0.09 | 0.89 |
| Trail Making Test | -0.08 | 1.12 | 0.00 | 1.05 |
| Semantic verbal fluency | -0.07 | 0.98 | 0.14 | 1.06 |
| Phonemic verbal fluency | -0.05 | 1.02 | -0.18 | 1.08 |
| Age (years) | 58.49 | 5.83 | 62.50 | 5.82 |
| Baseline and follow-up, n (%) | ||||
|---|---|---|---|---|
| Education | ||||
| Primary | 276 (4.64) | |||
| Elementary | 415 (6.98) | |||
| High School | 1,774 (29.82) | |||
| College (or higher) | 3,484 (58.56) | |||
| Sex | ||||
| Female | 3,307 (55.59) | |||
| Male | 2,642 (44.41) | |||
| Race* | ||||
| White | 3,347 (57.06) | |||
| Black | 2,283 (38.92) | |||
| Other | 236 (4.02) | |||
Neuropsychological tests are z-scored.
SD = standard deviation; CERAD WLT = word list test from the Consortium to Establish a Registry for Alzheimer’s Disease.
*
Race: 83 missing data from participants who refused to self-report their race.