Table 2.
Mean Age at First Concern, ADHD Diagnosis, and ADHD Medication Initiation for Children With ADHD Who Were and Were Not Expelled From Preschool, NS-DATA 2014
| Mean Age in Years (95% CI) |
p a | ||
|---|---|---|---|
| Expelled in Preschool Not Expelled in Preschool | |||
|
| |||
| First concernb | 2.9 (2.3–3.6) | 5.3 (5.2–5.5) | <0.01 |
| First ADHD diagnosis | 5.5 (5.0–6.0) | 6.9 (6.8–7.1) | <0.01 |
| ADHD medication initiation | 6.0 (5.4–6.6) | 7.6 (7.4–7.8) | <0.01 |
ADHD, attention-deficit/hyperactivity disorder; CI = exact confidence interval; NS-DATA, National Survey of the Diagnosis and Treatment of ADHD and Tourette Syndrome.
a
Based on Wald tests of difference in means by expelled vs not expelled.
b
Data file top-coded the maximum child age at first concern for ADHD at 13 yr or older (<1% of weighted sample), displayed mean may be lower than the actual mean of the reported data.