Developmental Medicine & Child Neurology

Original Articles

Children with ADHD and motor dysfunction compared with children with ADHD only

Raymond C Tervo  MD MSc a1 c1, Scott Azuma  PhD PT a2, Bruce Fogas  PhD a3 and Helen Fiechtner  PharmD a4
a1 Department of Pediatrics, University of Minnesota, Minneapolis, USA.
a2 School of Physical Therapy, The College of Saint Catherine, St. Paul, MN, USA.
a3 Departments of Psychiatry and Pediatrics, University of South Dakota, Sioux Falls, SD, USA.
a4 College of Pharmacy, South Dakota State University, Brookings, SD, USA.


The purpose of this study was to identify group differences in children with attention-deficit–hyperactivity disorder and motor dysfunction (ADHD-MD) and ADHD only, and to evaluate the medication responsiveness of ADHD-MD. Sixty-three children (49 males and 14 females; mean age 9 years 10 months, SD 2 years 10 months) underwent a triple blind, placebo-controlled crossover study evaluating two dose levels of methylphenidate (0.3 mg/kg and 0.05 mg/kg, twice daily) and placebo. Forty-nine trials were completed. Nineteen were children with ADHD-MD, 44 had ADHD only. Behavior and functioning were assessed at home and at school. Treatment effects were assessed using the Abbreviated Symptom Questionnaire for Parents and Teachers. Children with ADHD-MD were more likely to have severe ADHD-combined type and other neurodevelopmental and behavioral problems. Both groups of children had a linear dose response to medication (placebo, low, high) and there was no evidence of a group by dose interaction or an overall group effect at home or school. The lack of group effect suggests that these children responded to medication like the other subgroups.

(Accepted December 3 2001)

c1 Gillette Children's Specialty Healthcare, 200 East University Avenue, St. Paul, MN 55101, USA. E-mail: