Table 1.
Baseline descriptive statistics for the total sample and by cognitive impairment status during the study.
| Unimpaired | Impaired | Total | |
|---|---|---|---|
| N | 17104 (75.6%) | 5507 (24.4%) | 22611 (100%) |
| N assessments | 39430 (77.6%) | 11356 (22.4%) | 50786 (100%) |
| Sex (Women) | 10043 (58.7%) | 3159 (57.4%) | 13202 (58.4%) |
| Black | 2527 (14.8%) | 1489 (27.0%) | 4016 (17.8%) |
| White | 13289 (77.7%) | 3528 (64.1%) | 16817 (74.4%) |
| Other race | 1288 (7.5%) | 490 (8.9%) | 1778 (7.9%) |
| Latinx | 1856 (10.9%) | 878 (15.9%) | 2734 (12.1%) |
| Mean (SD) | Mean (SD) | Mean (SD) | |
| Age, yr. | 63.00 (9.52) | 70.32 (11.07) | 64.79 (10.40) |
| Time, yr. | 5.45 (4.63) | 4.52 (4.34) | 5.23 (4.58) |
| Assessments | 2.31 (1.13) | 2.06 (1.04) | 2.25 (1.11) |
| Education, yr. | 13.33 (2.76) | 11.00 (3.52) | 12.76 (3.13) |
| TICSm | 16.79 (3.27) | 10.79 (3.91) | 15.33 (4.29) |
| Neuroticism | 2.04 (0.62) | 2.11 (0.65) | 2.06 (0.63) |
| Extraversion | 3.21 (0.55) | 3.16 (0.58) | 3.19 (0.56) |
| Openness | 3.00 (0.54) | 2.81 (0.60) | 2.95 (0.56) |
| Agreeableness | 3.54 (0.47) | 3.46 (0.54) | 3.52 (0.49) |
| Conscientiousness | 3.40 (0.46) | 3.23 (0.53) | 3.36 (0.48) |
Note. TICSm = Telephone Interview for Cognitive Status. Unimpaired are participants who were not impaired at any assessment during the study. Impaired are participants who were impaired at any point during the study. 7741 participants provided 1 personality assessment; 5625 provided 2 assessments; 5192 provided 3 assessments; 4046 provided 4 assessments; and 7 provided 5 assessments.