Reading focus
Syllabus: How Should We Understand Neurodevelopmental Conditions?
Compare a single remission assessment with a course containing recurrence and further change.
Why you’re reading it. This revisits the opening discussion of developmental continuity without equating continuity with a constant level of difficulty.
A question to consider. How would you design follow-up assessments to distinguish symptom fluctuation, changing environmental demands, and changes in the way difficulties are reported?
Why this reading
A person’s status at one assessment may not describe their course over time. Sibley and colleagues examine repeated assessments of childhood ADHD into young adulthood, distinguishing full remission, partial remission, recurrence, and sustained remission to the study endpoint. The study makes definitions and observation schedules central to claims about persistence.
Before you read
Remission means meeting a specified threshold for reduced symptoms and impairment. Recurrence means difficulties return after remission. Here, recovery requires sustained full remission through the final observed assessment; it does not mean a demonstrated lifelong absence of difficulties. The follow-up is observational, even though participants originally entered a treatment trial.
Read for
- Compare the symptom, impairment, informant, and treatment criteria used to define full remission with simply falling below a diagnostic symptom threshold.
- Follow individual patterns across assessments. Why does the proportion in remission at one occasion answer a different question from the proportion who ever remit or remain remitted?
- Examine the endpoint, missing assessments, changing informants, and alternative definitions. How could these choices alter the apparent course?
Consider afterwards
- What is missing from a claim that a certain percentage of children outgrow ADHD if it relies on one adult assessment?
- What additional evidence would distinguish a real contextual change in difficulties from a change in measurement?
Editorial context
The analysis follows a US/Canadian childhood combined-type ADHD sample into the mid-twenties. It finds substantial fluctuation but cannot establish its causes or a lifelong prognosis, and other presentations may differ. Treatment status is part of the research definition of remission, not advice to stop treatment. Proposed explanations involving environment, development, or health remain hypotheses in this observational analysis.