Table 1. Demographic Characteristics of HRS Sample.
| Characteristic | Group1 APOE ε4+ G-Score high | Group2 APOE ε4-G-Score high | Group3 APOE ε4+ G-Score low | Group4 APOE ε4-G-Score low | Total |
|---|---|---|---|---|---|
| N (%) | 723 (9.7) | 2783 (37.4) | 840 (11.3) | 3105 (41.7) | 7451 |
| Mean # Observations(SD) * | 4.9 (2.4) | 5.1 (2.4) | 5.0 (2.4) | 5.2 (2.4) | 5.0 (2.4) |
| Mean Baseline Age (SD) | 67.4 (3.3) | 67.7 (3.6) | 67.7 (3.8) | 67.8 (3.7) | 67.7 (3.7) |
| Sex: Female (%) | 424 (58.6) | 1561 (56.1) | 475 (56.6) | 1790 (57.7) | 4250 (57.0) |
| Male (%) | 299 (41.4) | 1222 (43.9) | 365 (43.5) | 1315 (42.4) | 3201 (43.0) |
| Mean Yrs Education (SD) | 12.7 (3.2) | 12.5 (3.1) | 12.6 (3.1) | 12.6 (3.0) | 12.6 (3.1) |
| Mean Baseline TICS-m (SD) | 23.7 (4.4) | 23.8 (4.3) | 23.7 (4.3) | 24.0 (4.2) | 23.8 (4.3) |
Abbreviations: G-score: genetic risk score HRS: Health and Retirement Study; N: number; SD: standard deviation; TICS-m: Telephone Interview for Cognitive Status-modified; Yrs: years.
*There were statistically significant differences in the mean number of visits between the reference Group (Group 4) and Groups 3 and 1. There were also significant differences between Groups 1 and 2.