TABLE 1.
Demographics of participants tested on different scanners.
| Variable | Scanner 1 (1.5 T; n = 31) | Scanner 2 (3 T; n = 33) | Scanner 3 (3 T; n = 14) | Omnibus statistics |
| Age, yearsa | 32.8 (1.14) | 19.9 (0.193) | 38.0 (2.76) | F(2,75) = 61.1, p < 0.001*** |
| Biological sex female/male (n) | 18/13 | 8/25 | 4/10 | χ2(2) = 8.38, p = 0.015* |
| IQ estimate standard scorea | 105.5 (2.153) | 110.9 (1.843) | 108.4 (2.408) | F(2,62) = 1.635, p = 0.203 |
| Mother’s education, yearsa | 12.3 (0.656) | 14.8 (0.690) | 13.3 (1.06) | F(2,72) = 3.16, p = 0.0482* |
| Race/ethnicity (n) | χ2(8) = 28.8, p < 0.001*** | |||
| White | 9 | 27 | 9 | |
| African American | 6 | 1 | 0 | |
| Hispanic/Latinx | 13 | 2 | 3 | |
| Asian/Pacific Islander | 0 | 3 | 1 | |
| Other | 3 | 0 | 1 | |
| Cigarette smoking, n | 13 | 14 | 10 | χ2(2) = 3.94, p = 0.139 |
aUnless otherwise indicated, values are means (SE). IQ estimate = Weschler Test of Adult Reading. *p < 0.05; ***p < 0.001.