Table 1.
Sample Exclusions and Comparisons
| Reason for Exclusion | Excluded (Amygdala–Seed) | Excluded (Hippocampus–Seed) |
|---|---|---|
| Refused MRI | 16 | 16 |
| Exceeded MRI table weight limit | 3 | 3 |
| Medical restriction | 1 | 1 |
| Braces or other metal in body | 7 | 7 |
| Risk of pregnancy | 1 | 1 |
| Excluded for autism spectrum disorder diagnosis | 2 | 2 |
| Did not complete dMRI scan | 11 | 11 |
| Preprocessing outliers >5% in diffusion dataa | 1 | 3 |
| No probabilistic tractography model convergenceb | 5 | 2 |
| Less than 70% of voxels in pFC masks | 1 | 0 |
| Include vs. Full Sample Comparisonsc | |||
|---|---|---|---|
| Full Sample (n = 237) | Included Sample (Amygdala–Seed; n = 189) | Included Sample (Hippocampus–Seed; n = 191) | |
| Age | M = 15.88 years | M = 15.84 years | M = 15.85 years |
| SD = 0.54 years | SD = 0.52 years | SD = 0.53 years | |
| Pubertal stage | M = 3.24 | M = 3.26 | M = 3.24 |
| SD = 0.59 years | SD = 0.58 years | SD = 0.59 years | |
| Sex | F = 125 (52.7%) | F = 102 (54.0%) | F = 102 (53.4%) |
| M = 112 (47.3%) | M = 87 (46.0%) | M = 89 (46.6%) | |
| Race | Black = 181 (76.4%) | Black = 146 (77.2%) | Black = 148 (77.5%) |
| White = 32 (13.5%) | White = 22 (11.6%) | White = 21 (11.0%) | |
| Hispanic/Latino = 13 (5.5%) | Hispanic/Latino = 12 (6.3%) | Hispanic/Latino = 12 (6.3%) | |
| Other/multiracial = 11 (4.6%) | Other/multiracial = 9 (4.8%) | Other/multiracial = 10 (5.2%) | |
| Annual income | <$15,000 = 57 (24.1%) | <$15,000 = 48 (25.4%) | <$15,000 = 47 (24.6%) |
| $15,000–39,999 = 70 (29.5%) | $15,000–39,999 = 57 (30.2%) | $15,000–39,999 = 58 (30.4%) | |
| $40,000–69,999 = 58 (24.5%) | $40,000–69,999 = 43 (22.8%) | $40,000–69,999 = 44 (23.0%) | |
| >$70,000 = 51 (21.5%) | >$70,000 = 40 (21.2%) | >$70,000 = 41 (21.5%) | |
| Missing/not reported = 1 (0.4%) | Missing/not reported = 1 (0.5%) | Missing/not reported = 1 (0.5%) | |
a
Outliers detected using dMRI method from Mrtrix (v.3.0.R3). Slices with average intensity 4 SDs or more lower than predicted by eddy’s Gaussian process model were marked as outliers and replaced with model predictions. One participant was excluded from sample due to having more than 5% of total slices replaced.
b
Zero value connectivity coefficient for at least one seed–target pair.
c
Demographic characteristics did not significantly differ across samples: age, F(2, 614) = 0.13, p = .878; pubertal stage, F(2, 614) = 0.08, p = .923; sex, F(2, 614) = 0.06, p = .941; race, F(2, 614) = 0.277, p = .758; annual income, F(2, 611) = 0.064, p = .938.