Table 1.
Comparison of Two Diagnostic Groups on Relevant Demographic Variables
| Factor | ADHD (n=57) | Comparison (n=98) | t | p | ||
|---|---|---|---|---|---|---|
| M | (SD) | M | (SD) | |||
| Phase 1 Age (years) | 7.17 | (1.66) | 7.23 | (1.59) | 0.22 | 0.83 |
| Phase 2 Age (years) | 8.91 | (1.77) | 8.94 | (1.61) | 0.11 | 0.92 |
| DSM-IV interview | ||||||
| Inattention | 6.07 | (2.41) | 0.14 | (0.43) | 23.74 | <0.001 |
| Hyp/Imp | 5.98 | (2.08) | 0.19 | (0.49) | 26.30 | <0.001 |
| Oppositionality | 3.29 | (2.31) | 0.28 | (0.72) | 11.96 | <0.001 |
| Mother's education | 14.39 | (2.18) | 15.59 | (2.27) | 3.16 | <0.01 |
| Vocabulary scaled score | 10.28 | (3.77) | 12.77 | (3.40) | 4.21 | <0.001 |
| OWLS Language Assessment | ||||||
| Listening Comprehension | 96.5 | (15.5) | 103.1 | (12.1) | 2.86 | < 0.005 |
| Oral Expression | 95.0 | (13.4) | 108.6 | (15.3) | 5.43 | < 0.001 |
| Conners Parent Rating Scale | ||||||
| Oppositional | 66.07 | (12.15) | 48.35 | (6.88) | 11.26 | <0.001 |
| Inattention | 69.70 | (10.85) | 47.63 | (5.70) | 16.1 | <0.001 |
| Hyperactivity | 76.78 | (10.43) | 49.53 | (6.08) | 19.96 | <0.001 |
| ADHD Index | 72.22 | (8.97) | 47.83 | (5.74) | 20.05 | <0.001 |
Hyp/Imp hyperactivity/impulsivity
a
The Conners Parent Ratings and the OWLS language assessment were obtained at Phase 2 of data collection