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The stability and persistence of symptoms in childhood-onset ADHD

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Abstract

The course of childhood-onset attention deficit hyperactivity disorder (ADHD) varies across individuals; some will experience persistent symptoms while others’ symptoms fluctuate or remit. We describe the longitudinal course of ADHD symptoms and associated clinical characteristics in adolescents with childhood-onset ADHD. Participants (aged 6–12 at baseline) from the Longitudinal Assessment of Manic Symptoms (LAMS) study who met DSM criteria for ADHD prior to age 12 were evaluated annually with the Kiddie Schedule for Affective Disorders and Schizophrenia for eight years. At each timepoint, participants were categorized as meeting ADHD criteria, subthreshold criteria, or not having ADHD. Stability of course was defined by whether participants experienced consistent ADHD symptoms, fluctuating symptoms, or remission. The persistence of the symptoms was defined by symptom status at the final two follow-ups (stable ADHD, stable remission, stable partial remission, unstable). Of 685 baseline participants, 431 had childhood-onset ADHD and at least two follow-ups. Half had a consistent course of ADHD, nearly 40% had a remitting course, and the remaining participants had a fluctuating course. More than half of participants met criteria for ADHD at the end of their participation; about 30% demonstrated stable full remission, 15% had unstable symptoms, and one had stable partial remission. Participants with a persistent course and stable ADHD outcome reported the highest number of symptoms and were most impaired. This work builds on earlier studies that describe fluctuating symptoms in young people with childhood-onset ADHD. Results emphasize the importance of ongoing monitoring and detailed assessment of factors likely to influence course and outcome to help young people with childhood-onset ADHD.

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Data available upon request from authors.

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Funding

The manuscript is a publication of secondary analyses from a multi-site study supported by the National Institute of Mental Health; Case Western Reserve University: R01 MH073967-06A1, Cincinnati Children’s Hospital Medical Center: R01 MH073816-06A1, The Ohio State University: R01 MH073801-06A1, and University of Pittsburgh: R01 MH073953-06A1. It was additionally supported by K23MH120505.

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Authors and Affiliations

Authors

Contributions

Dr. Van Meter conceived of the study idea, wrote the preliminary manuscript draft, and conducted all analyses. Dr. Sibley conceived of the study idea and contributed to writing and editing. Dr. Vandana conceived of the study idea and contributed to writing and editing. Dr. Findling secured study funding, conceptualized the original study on which this secondary analysis is based, and contributing to editing. Dr. Fristad secured study funding and conceptualized the original study on which this secondary analysis is based, and contributed to editing. Dr. Birmaher secured study funding and conceptualized the original study on which this secondary analysis is based, and contributed to editing. Dr. Horwitz secured study funding and conceptualized the original study on which this secondary analysis is based, and contributed to editing. Dr. Youngstrom secured study funding and conceptualized the original study on which this secondary analysis is based, and contributed to editing. Dr. Arnold conceived of the study idea and contributed to writing and editing. He additionally conceptualized the original study on which this secondary analysis is based.

Corresponding author

Correspondence to Anna R. Van Meter.

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Conflict of interest

Dr. Van Meter and Dr. Vandana have no conflicts to disclose. Dr. Sibley has received book royalties from Guilford Press for a book on the treatment of ADHD in adolescence and has consulted with Supernus Pharmaceuticals. Dr. Findling receives or has received research support, acted as a consultant and/or has received honoraria from Abbvie, Acadia, Adamas, Afecta, Akili, Alkermes, Allergan, American Academy of Child & Adolescent Psychiatry, American Psychiatric Press, Arbor, Axsome, Idorsia, Intracellular Therapies, Iqvia, Lundbeck, Medavante Prophase, MJH Life Sciences, Neurim, NIH, Novartis, Otsuka, PaxMedica, PCORI, Pfizer, Physicians’ Postgraduate Press, Radius, Receptor Life Sciences, Sage, Signant Health, Sunovion, Supernus Pharmaceuticals, Syneos, Takeda, Tris, and Viatris. Dr. Fristad receives royalties from American Psychiatric Press and Guilford Press, an editorial stipend from the Society of Clinical Child and Adolescent Psychology, and has received research funding from Janssen. Dr. Birmaher reports grants from NIMH, during the conduct of the study; royalties from Random House, Wolters Kluwer (UpToDate) and Lippincott, Williams and Wilkins. Dr. Horwitz receives royalties from American Psychiatric Press. Dr. Youngstrom has consulted with Signant Health about psychological assessment, received royalties from the American Psychological Association and Guilford Press, and is the co-founder and Executive Director of Helping Give Away Psychological Science 501c3. Dr. Arnold has received research funding from Supernus Pharmaceuticals, Roche/Genentech Phanaceuticals, Otsuka Pharmaceuticals, Axial, and YoungLiving Essential Oils and National Institute of Health (USA, R01 MH 100144), has consulted with Pfizer Pharmaceuticals and CHADD, and been on advisory boards for Otsuka and Roche/Genentech.

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All procedures were approved by the participating academic centers’ IRBs.

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All parents/guardians provided written informed consent and children provided assent.

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Van Meter, A.R., Sibley, M.H., Vandana, P. et al. The stability and persistence of symptoms in childhood-onset ADHD. Eur Child Adolesc Psychiatry 33, 1163–1170 (2024). https://doi.org/10.1007/s00787-023-02235-3

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  • DOI: https://doi.org/10.1007/s00787-023-02235-3

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