Children With Attention-Deficit/Hyperactivity Disorder Are at Increased Risk for Slowed Growth and Short Stature in Early Childhood.

Our objective was to evaluate the risk of short stature in children with attention-deficit/hyperactivity disorder (ADHD) and the effect of ADHD and its treatment on height-for-age z score (HAZ) and body mass index-for-age z score (BMIZ) in early childhood. We evaluated 7603 children from the Early Childhood Longitudinal Study-Kindergarten Cohort 2011 and found that children with ADHD had lower HAZ at second and fourth grades and lower BMIZ at K to fourth grade. Children with ADHD at fourth grade had almost 4 times higher odds of short stature. Children with ADHD at K grew at a slower rate from K to fourth grade (difference in ΔHAZ = 0.23, 95% confidence interval = 0.04-0.42) and had less gain in BMI (difference in ΔBMIZ = 0.16, 95% confidence interval = 0.03-0.29). Longer duration of ADHD medication use was associated with lower HAZ at fourth grade and slower growth from K to fourth grade. These data may assist pediatricians in considering risk of poor growth in children with ADHD.