Table 1.
Participant Characteristics Overall and by Subgroups for the KADRC and TAPS Samplesa
| Characteristic | Overall | Subgroup | Subgroup |
|---|---|---|---|
|
KADRC Overall (N = 219) |
KADRC Education Intervention (n = 119) |
KADRC Placebo Presentation (n = 100) |
|
| Age, mean (SD), y | 74.58 (8.05) | 73.87 (8.58) | 75.42 (7.33) |
| Female sex, No. (%) | 133 (60.7) | 76 (63.9) | 57 (57.0) |
| White race, No. (%) | 183 (83.6) | 98 (82.4) | 85 (85.0) |
| Education, mean (SD), y | 15.91 (2.45) | 16.06 (2.33) | 15.74 (2.58) |
| MMSE score, mean (SD) | 29.19 (1.15) | 29.14 (1.24) | 29.25 (1.03) |
| Subjective risk of AD, mean (SD), % | 43.89 (26.55) | 45.34 (26.68) | 42.16 (26.44) |
| Parent history of AD, No. (%) | 110 (50.2) | 56 (47.1) | 54 (54.0) |
| APOE4 positive, No. (%) | 81 (37.0) | 48 (40.3) | 33 (33.0) |
|
TAPS Overall (N = 1418) |
TAPS “Likely” Sample (n = 208) |
TAPS “Specialized” Sample (n = 92) |
|
| Age, mean (SD), y | 46.62 (16.37) | 45.18 (15.25) | 45.08 (15.47) |
| Female sex, No. (%) | 716 (50.5) | 105 (50.5) | 46 (50.0) |
| White race, No. (%) | 1087 (76.7) | 162 (77.9) | 72 (78.3) |
| Education, mean (SD), y | 13.85 (2.57) | 14.29 (2.58) | 14.61 (2.40) |
| Parent history of AD, No. (%) | 91 (6.4) | 32 (15.4) | 32 (34.8) |
Abbreviations: AD, Alzheimer disease; APOE4, apolipoprotein E4; KADRC, Knight Alzheimer Disease Research Center; MMSE, Mini-Mental State Examination; TAPS, The American Panel Survey.
a
The MMSE and APOE status were not available for TAPS samples. TAPS “Likely” Sample consists of TAPS participants who are extremely interested in participating in AD research and may or may not have a family history of AD. TAPS “Specialized” Sample consists of TAPS participants who are extremely interested in participating in AD research and have a family history of AD.