Table 2.
Demographic Characteristics of Sample at each Visit.
| Visit 1 (N=383) |
Visit 2 (N=331) |
Visit 3 (N=224) |
||
|---|---|---|---|---|
| Age in years (N, %) | 6 | 64 (17%) | 0 | 0 |
| 7 | 41 (11%) | 12 (4%) | 0 | |
| 8 | 36 (9%) | 48 (15%) | 0 | |
| 9 | 36 (9%) | 36 (11%) | 9 (4%) | |
| 10 | 35 (9%) | 34 (10%) | 43 (19%) | |
| 11 | 27 (7%) | 27 (8%) | 23 (10%) | |
| 12 | 24 (6%) | 27 (8%) | 21 (9%) | |
| 13 | 27 (7%) | 25 (8%) | 12 (5%) | |
| 14 | 23 (6%) | 19 (6%) | 22 (10%) | |
| 15 | 24 (6%) | 18 (5%) | 21 (9%) | |
| 16 | 19 (5%) | 29 (9%) | 20 (9%) | |
| 17 | 21 (5%) | 18 (5%) | 13 (6%) | |
| 18 | 6 (2%) | 17 (5%) | 11 (5%) | |
| 19 | 15 (5%) | 8 (4%) | ||
| 20 | 1 (0%) | 10 (4%) | ||
| 21 | 9 (4%) | |||
| 22 | 3 (1%) | |||
| Sex (N, % male) | 185 (48%) | 157 (47%) | 104 (46%) | |
| Handedness (N, % right-handed) | 336 (87%) | 294 (89%) | 197 (88%) | |
| Family income (N, %) | Low | 93 (24%) | 81 (24%) | 52 (23%) |
| Medium | 156 (41%) | 133 (40%) | 96 (43%) | |
| High | 134 (35%) | 117 (35%) | 76 (34%) | |
| Mother’s Racial identity (N, %) | White | 312 (81%) | 271 (82%) | 184 (83%) |
| African-American | 32 (8%) | 27 (8%) | 18 (8%) | |
| Native American | 1 (0%) | 1 (0%) | 0 (0%) | |
| Asian | 6 (2%) | 4 (1%) | 1 (0%) | |
| Mixed | 3 (1%) | 2 (1%) | 1 (0%) | |
| Not provided | 29 (8%) | 26 (8%) | 20 (9%) | |
| Father’s Racial identity (N, %) | White | 300 (78%) | 261 (79%) | 177 (79%) |
| African-American | 33 (9%) | 27 (8%) | 18 (8%) | |
| Native American | 2 (1%) | 4 (1%) | 2 (1%) | |
| Asian | 7 (2%) | 6 (2%) | 3 (1%) | |
| Mixed | 5 (1%) | 5 (2%) | 3 (1%) | |
| Not provided | 34 (9%) | 28 (8%) | 21 (9%) | |
| Ethnicity (N, % Hispanic) | Mother | 29 (8%) | 28 (8%) | 21 (9%) |
| Father | 38 (10%) | 32 (10%) | 22 (10%) |