Table 1.
Demographic and genetic risk information for adoptees and non-adoptees.
| Variable | Adoptees N = 117 | Non-adoptees N = 4382 |
|---|---|---|
| Age (years) | 9.96 ± 0.60 | 9.94 ± 0.63 |
| Sex (F/M) | 59/58 | 2184/2198 |
| Handedness (% mostly right-handed) | 75% | 82% |
| Youth race | White only (33%) | White only (73%) |
| Black only (35%) | Black only (10%) | |
| Asian only (9%) | Asian only (1%) | |
| Other/mixed race (23%) | Other/mixed race (16%) | |
| Participating parent race* | White only (73%) | White only (78%) |
| Black only (14%) | Black only (10%) | |
| Asian only (3%) | Asian only (3%) | |
| Other/mixed race (10%) | Other/mixed race (9%) | |
| Family income (USD)** | 0 to 24,999 (7%) | 0 to 24,999 (10%) |
| 25,000 to 49,999 (11%) | 25,000 to 49,999 (13%) | |
| 50,000 to 74,999 (15%) | 50,000 to 74,999 (14%) | |
| 75,000 to 99,999 (21%) | 75,000 to 99,999 (16%) | |
| 100,000 to 199,999 (36%) | 100,000 to 199,999 (34%) | |
| 200,000 + (10%) | 200,000 + (14%) | |
| Material deprivation | 0.26 ± 0.83 | 0.37 ± 0.98 |
| Participating parent education* | Graduate school (40%) | Graduate school (29%) |
| Four-/three-year college (26%) | Four-/three-year college (32%) | |
| One-/two-year college (22%) | One-/two-year college (28%) | |
| Highschool (12%) | Highschool (11%) | |
| Crystallised cognition | 85.70 ± 6.32 | 87.94 ± 6.62 |
| APOE AD PRS | 0.023 ± 0.030 | 0.028 ± 0.033 |
| No-APOE AD PRS | 0.007 ± 0.013 | 0.003 ± 0.012 |
| MDD PRS | 0.000 ± 0.003 | 0.000 ± 0.003 |
| AD PRS | 0.016 ± 0.018 | 0.018 ± 0.020 |
GRS genetic risk score, AD Alzheimer’s Disease, MDD Major Depressive Disorder. *Due to data availability, we present racial and educational information for the participating parent who tended to be the mother in both adoptive and birth families (91% for both). **Only 103 adoptive families reported income.