Table 2.
Demographic characteristics and variables of interest in the matched discovery (n = 3525) and replication (n = 3447) samples
| Total | Discovery | Replication | P-value | |
|---|---|---|---|---|
| Age (Months) | 119.5 (±7.5) | 119.5 (±7.6) | 119.5 (±7.5) | 0.94 |
| Sex (F) | 3494 (50.1%) | 1806 (51.2%) | 1688 (49.0%) | 0.06 |
| General Cognition | 0.1 (±0.7) | 0.1 (±0.7) | 0.1 (±0.7) | 0.18 |
| Executive Function | 0.0 (±0.8) | 0.0 (±0.8) | 0.1 (±0.7) | 0.23 |
| Learning/Memory | 0.1 (±0.7) | 0.1 (±0.7) | 0.0 (±0.7) | 0.22 |
| ADHD Medication | 536 (7.7%) | 283 (8.0%) | 253 (7.3%) | 0.30 |
| Antidepressant Medication | 122 (1.8%) | 69 (2.0%) | 53 (1.5%) | 0.20 |
| Antipsychotic Medication | 40 (0.6%) | 23 (0.7%) | 17 (0.5%) | 0.43 |
| CBCL Ext. | 0.93 | |||
| Mean (SD) | 4.2 (±5.5) | 4.2 (±5.6) | 4.1 (±5.4) | |
| Missing | 1 (0.0%) | 0 (0.0%) | 1 (0.0%) | |
| CBCL Int. | 0.50 | |||
| Mean (SD) | 5.0 (±5.5) | 5.0 (±5.6) | 4.9 (±5.4) | |
| Missing | 1 (0.0%) | 0 (0.0%) | 1 (0.0%) | |
| CBCL Prob. | 0.99 | |||
| Mean (SD) | 17.3 (±17.2) | 17.4 (±17.5) | 17.1 (±16.9) | |
| Missing | 1 (0.0%) | 0 (0.0%) | 1 (0.0%) | |
| Household Income | 0.28 | |||
| [<50 K] | 1645 (23.6%) | 806 (22.9%) | 839(24.4%) | |
| [≥50 K & <100 K] | 1902 (27.3%) | 983 (27.9%) | 919 (26.7%) | |
| [≥100 K] | 2870 (41.2%) | 1451 (41.2%) | 1419 (41.2%) | |
| Missing | 552 (7.9%) | 284 (8.1%) | 268 (7.8%) | |
| Race | 0.46 | |||
| White | 4723 (67.8%) | 2426 (68.8%) | 2297 (66.7%) | |
| Black | 910 (13.1%) | 442 (12.5%) | 468 (13.6%) | |
| Asian | 145 (2.1%) | 71 (2.0%) | 74 (2.1%) | |
| AIAN/NHPI | 41 (0.6%) | 23 (0.7%) | 18 (0.5%) | |
| Other | 242 (3.5%) | 114 (3.2%) | 128 (3.7%) | |
| Mixed | 823 (11.8%) | 410 (11.6%) | 413 (12.0%) | |
| Missing | 85 (1.2%) | 38 (1.1%) | 47 (1.4%) | |
| Parent Education | 0.31 | |||
| <HS Diploma | 236 (3.4%) | 117 (3.3%) | 119 (3.5%) | |
| HS Diploma/GED | 542 (7.8%) | 254 (7.2%) | 288 (8.4%) | |
| Some College | 1781 (25.6%) | 905 (25.7%) | 876 (25.4%) | |
| Bachelor | 1885 (27.0%) | 980 (27.8%) | 905 (26.3%) | |
| Post Graduate Degree | 2519 (36.1%) | 1264 (35.9%) | 1255 (36.4%) | |
| Missing | 6 (0.1%) | 4 (0.1%) | 2 (0.1%) |
There were no statistically significant differences between the discovery and replication samples in any of the attributes included in this table, evaluated using analyses of variance (ANOVAs), Fisher’s exact tests, or standard Chi Squares analyses as appropriate.
AIAN American Indian/Alaska Native, NHPI Native Hawaiian and other Pacific Islander, HS high school, GED General Educational Development, CBCL child behavior checklist.