Fig. 1From: Clinical implications of ADHD, ASD, and their co-occurrence in early adulthood—the prospective ABIS-studyStudy population flow-chart Definition of case and control groups based on the cumulative incidence rates for ADHD, ASD, and their co-occurrence from birth until 17 years of age. ADHD indicates attention-deficit/hyperactivity disorder, while ASD indicates autism spectrum disorderBack to article page