Long-term effects of stimulant treatment on ADHD symptoms, social–emotional functioning, and cognition

Lizanne Schweren, Pieter Hoekstra, Marloes van Lieshout, Jaap Oosterlaan, Nanda Lambregts-Rommelse, Jan Buitelaar, Barbara Franke, Catharina Hartman

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Background: Methodological and ethical constraints have hampered studies into long-term lasting outcomes of stimulant treatment in individuals with attention-deficit/hyperactivity disorder (ADHD). Lasting effects may be beneficial (i.e. improved functioning even when treatment is temporarily ceased) or detrimental (i.e. worse functioning while off medication), but both hypotheses currently lack empirical support. Here we investigate whether stimulant treatment history predicts long-term development of ADHD symptoms, social–emotional functioning or cognition, measured after medication wash-out. Methods: ADHD symptoms, social–emotional functioning and cognitive test performance were measured twice, 6 years apart, in two ADHD groups (stimulant-treated versus not stimulant-treated between baseline and follow-up). Groups were closely matched on baseline clinical and demographic variables (n = 148, 58% male, age = 11.1). A matched healthy control group was included for reference. Results: All but two outcome measures (emotional problems and prosocial behaviour) improved between baseline and follow-up. Improvement over time in the stimulant-treated group did not differ from improvement in the not stimulant-treated group on any outcome measure. Conclusions: Stimulant treatment is not associated with the long-term developmental course of ADHD symptoms, social–emotional functioning, motor control, timing or verbal working memory. Adolescence is characterised by clinical improvement regardless of stimulant treatment during that time. These findings are an important source to inform the scientific and public debate.

LanguageEnglish
Pages217-223
Number of pages7
JournalPsychological Medicine
Volume49
Issue number2
DOIs
Publication statusPublished - 1 Jan 2019

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Attention Deficit Disorder with Hyperactivity
Cognition
Outcome Assessment (Health Care)
Therapeutics
Short-Term Memory
History
Demography
Control Groups

Keywords

  • Attention
  • attention-deficit/hyperactivity disorder
  • cognition
  • methylphenidate
  • pharmacotherapy
  • stimulant treatment

Cite this

Schweren, L., Hoekstra, P., van Lieshout, M., Oosterlaan, J., Lambregts-Rommelse, N., Buitelaar, J., ... Hartman, C. (2019). Long-term effects of stimulant treatment on ADHD symptoms, social–emotional functioning, and cognition. Psychological Medicine, 49(2), 217-223. https://doi.org/10.1017/S0033291718000545
Schweren, Lizanne ; Hoekstra, Pieter ; van Lieshout, Marloes ; Oosterlaan, Jaap ; Lambregts-Rommelse, Nanda ; Buitelaar, Jan ; Franke, Barbara ; Hartman, Catharina. / Long-term effects of stimulant treatment on ADHD symptoms, social–emotional functioning, and cognition. In: Psychological Medicine. 2019 ; Vol. 49, No. 2. pp. 217-223.
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Schweren, L, Hoekstra, P, van Lieshout, M, Oosterlaan, J, Lambregts-Rommelse, N, Buitelaar, J, Franke, B & Hartman, C 2019, 'Long-term effects of stimulant treatment on ADHD symptoms, social–emotional functioning, and cognition', Psychological Medicine, vol. 49, no. 2, pp. 217-223. https://doi.org/10.1017/S0033291718000545

Long-term effects of stimulant treatment on ADHD symptoms, social–emotional functioning, and cognition. / Schweren, Lizanne; Hoekstra, Pieter; van Lieshout, Marloes; Oosterlaan, Jaap; Lambregts-Rommelse, Nanda; Buitelaar, Jan; Franke, Barbara; Hartman, Catharina.

In: Psychological Medicine, Vol. 49, No. 2, 01.01.2019, p. 217-223.

Research output: Contribution to JournalArticleAcademicpeer-review

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AU - Schweren, Lizanne

AU - Hoekstra, Pieter

AU - van Lieshout, Marloes

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AU - Lambregts-Rommelse, Nanda

AU - Buitelaar, Jan

AU - Franke, Barbara

AU - Hartman, Catharina

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