Objectives:
This study aimed to determine whether parent ratings of attention-deficit/hyperactivity disorder (ADHD) symptom severity or externalizing symptoms (EXT) or internalizing symptoms (INT) moderate response to stimulants (STIM) and alpha-2 adrenergic agonists (A2As) in preschool ADHD.
Methods:
Health records for children treated with medication for ADHD and with parent rating scale data available (N = 309; age