Margaret Sibley, PhD, on Fluctuating ADHD Across the Lifespan in the MTA Study

In this Behind the Manuscript podcast episode, Margaret Sibley, PhD, Professor of Psychiatry and Behavioral Sciences at the University of Washington School of Medicine and clinical psychologist at Seattle Children’s Hospital, discusses her article, “Characteristics and Predictors of Fluctuating ADHD in the Multimodal Treatment of ADHD Study.” The conversation places the article in the context of the long-running MTA cohort and the field’s historical focus on whether childhood ADHD either persists or remits by adulthood.

Sibley reviews the origins of the NIMH-funded MTA trial, which compared stimulant medication treatment, behavioral intervention, combined treatment, and a community control group during a 14-month acute treatment phase. She notes that by three years the treatment groups had reconverged, with no separation between groups, and says the follow-up phase then shifted toward understanding what happens to people with ADHD as they grow up and transition to adulthood.

She then describes the article’s main findings. Over 60% of the sample followed a fluctuating course, while about 10% had persistent ADHD every single year of the study, about 10% had full remission, and about 15% had partial remission. Sibley describes the persistent group as the most impaired, with more comorbidities, mood problems across the lifespan, and substance use beginning in adolescence. She also discusses the partial remission group’s high comorbid anxiety, the possibility that anxiety may be a little protective, and the article’s final analysis suggesting a relationship between environmental demands and periods of remission, which she frames as an initial signal that environmental fit may matter in ADHD management.