Table IV.
Comparisons of Demographic Factors, ADHD Subtypes, Symptom Scores, and Other Psychiatric Comorbidities Including Only Males
| 22q11.2DS ADHD (n = 26) | Clinical ADHD (n = 506) | |||
|---|---|---|---|---|
| Variable | Mean (SD) or % | Mean (SD) or % | χ2, t, z | P |
| Age | 9.41(1.95) | 10.89(2.95) | t=2.53 | 0.01 |
| IQ | 79.04(12.25) | 82.52(13.44) | t=1.24 | 0.22 |
| ADHD comparisons | ||||
| Inattentive subtype | 62% | 8% | χ2=77.77 | P <0.001 |
| Hyperactive–impulsive subtype | 8% | 9% | ||
| Combined subtype | 30% | 83% | ||
| ADHD symptoms—inattention | 7.54(1.10) | 7.62(1.53) | z=1.05 | 0.29 |
| ADHD symptoms—hyperactivity–impulsivity | 4.96(2.34) | 7.79(1.52) | z=6.27 | P <0.001 |
| ADHD symptoms—total | 12.5(2.66) | 15.41(2.31) | z=5.17 | P <0.001 |
| Other psychopathology | ||||
| Oppositional defiant disorder | 35% | 47% | χ2=1.42 | 0.23 |
| Conduct disorder | 0% | 20% | χ2=6.47 | 0.01 |
| Generalized anxiety disorder | 4% | 2% | χ2=0.19 | 0.66 |
| Separation anxiety disorder | 10% | 3% | χ2=1.64 | 0.20 |
| Major depressive disorder | 0% | 1% | χ2=0.27 | 0.60 |
| Tic disorder | 15% | 11% | χ2=0.42 | 0.52 |
| ODD/CD symptoms | 4.04(1.82) | 6.69(2.77) | z=4.85 | P <0.001 |
| Worries symptoms | 1.24(1.60) | 1.02(1.52) | z=‐0.78 | 0.44 |
| Depression symptoms | 0.64(1.04) | 0.45(0.88) | z=‐1.30 | 0.20 |
| Sleep symptoms | 1.31(1.26) | 1.17(1.12) | z=‐0.46 | 0.64 |
ADHD, attention‐deficit/hyperactivity disorder; ODD, oppositional defiant disorder; CD, conduct disorder.
The bold values signify a P‐value ≤0.05.