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Demographic Characteristics for Score-Development and Validation Samples
| Demographic Variables | Score Development Sample | Validation Sample | P |
|---|---|---|---|
| Male gender, % | 65.0 | 71.4 | .513 |
| Age, mean (SD), mo | 107.6 (18.9) | 104.9 (18.0) | .415 |
| White ethnicity, % | 82.3 | 85.7 | .567 |
| Socioeconomic status (Hollingshead > IV), % | 69.8 | 71.4 | .757 |
| ADHD diagnosis, % | 80.7 | 78.8 | .374 |
There were no significant differences.
