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A 6-year follow-up of a large European cohort of children with attention-deficit/hyperactivity disorder-combined subtype: outcomes in late adolescence and young adulthood.

ABSTRACT: There are very few studies on the long-term outcome of children and adolescents with ADHD-combined type in Europe. The objective of the present study is to assess the 6-year outcome (including pharmacological treatment) of a large cohort of participants with ADHD-combined type (N = 347, mean age 11.4 years) in late adolescence and early adulthood. At study entry and follow-up (mean age 17.4 years), participants were comprehensively assessed on ADHD and comorbid disorders by structured psychiatric interviews and multi-informant questionnaires. Overall functioning was assessed by the Children's Global Assessment Scale. The retention rate was 75.6 %. The majority of participants (86.5 %) persisted in a DSM-5 ADHD diagnosis, 8.4 % had a subthreshold diagnosis, and 5.1 % remitted from the disorder at follow-up. Comorbidities decreased strongly; oppositional defiant disorder: 58 > 31 %, conduct disorder: 19 > 7 %. At follow-up, mood- and anxiety disorders were virtually non-existent following strict criteria (1-3 %). Percentage of children having had pharmacological treatment at any time increased from 79 to 91 %. On the Children's Global Assessment Scale, 48.5 % of participants were still functionally impaired at follow-up. Parental ADHD, higher ADHD symptom severity at baseline and higher parent-reported impairment at baseline positively predicted current ADHD symptom severity (R (2) = 20.9 %). Younger baseline age, higher ADHD symptom severity at baseline and higher parent-reported impairment at baseline were positively associated with poorer overall functioning (R (2) = 17.8 %). Pharmacological treatment had no (beneficial) impact on either ADHD symptom severity or overall functioning. Results confirm that ADHD is largely persistent into late adolescence with severity and family history for the disorder as important risk factors.

SUBMITTER: van Lieshout M

PROVIDER: S-EPMC4990613 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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A 6-year follow-up of a large European cohort of children with attention-deficit/hyperactivity disorder-combined subtype: outcomes in late adolescence and young adulthood.

van Lieshout Marloes M Luman Marjolein M Twisk Jos W R JW van Ewijk Hanneke H Groenman Annabeth P AP Thissen Andrieke J A M AJ Faraone Stephen V SV Heslenfeld Dirk J DJ Hartman Catharina A CA Hoekstra Pieter J PJ Franke Barbara B Buitelaar Jan K JK Rommelse Nanda N J NN Oosterlaan Jaap J

European child & adolescent psychiatry 20160202 9

There are very few studies on the long-term outcome of children and adolescents with ADHD-combined type in Europe. The objective of the present study is to assess the 6-year outcome (including pharmacological treatment) of a large cohort of participants with ADHD-combined type (N = 347, mean age 11.4 years) in late adolescence and early adulthood. At study entry and follow-up (mean age 17.4 years), participants were comprehensively assessed on ADHD and comorbid disorders by structured psychiatri ...[more]

PMID: 26837866

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Project description:ObjectiveTo examine delayed effects of theta-beta ratio (TBR) neurofeedback (NF) for attention-deficit/hyperactivity disorder (ADHD) 25 months after baseline, ∼21 months after end of treatment.MethodChildren aged 7 to 10 years with rigorously diagnosed ADHD had been randomized to 38 sessions of TBR NF (n = 84) or control treatment (n = 58) of identical appearance, intensity/frequency, and duration, differing only in that reinforcement for controls was based on a pre-recorded electroencephalogram (EEG) of another child. Child, parent, and all site staff were blinded until after 25-month assessments, with only one-fourth able to guess the control treatment correctly. Baseline assessments were repeated off medication after 25 months.ResultsOf the 142 participants, 120 had 25-month follow-up (84.5% retention). Only 12 participants (6 controls) had NF after the study treatment, greatly retaining the randomization. The primary outcome, parent-rated inattention, was not significantly different between treatments despite large pre-post effect sizes (NF recipients, d = 1.63; controls, d = 1.42). Most secondary measures showed the same pattern. Response rates (Clinical Global Impression-Improvement ≤2) were 58.6% of NF recipients and 66% of controls (not significant). Marginally more controls than NF recipients needed medication (57.1% vs 38.6%, p = .059); specifically, 7.1% of NF recipients and 4% of controls had reduced medication need, whereas 34.3% of NF recipients and 50% of controls needed more medication (p = 0.084).ConclusionMost of the large within-group improvement from the NF treatment package reported by unblinded studies and replicated in this blinded study reflects nonspecific effects, not specific effects of deliberate down-training of EEG theta-beta power ratio. At 25-month follow-up, it appears comparable to the evidence-based Multimodal Treatment Study of ADHD (MTA) treatments, suggesting a psychotherapeutic/behavioral effect.Clinical trial registration informationDouble-Blind 2-Site Randomized Clinical Trial of Neurofeedback for ADHD; http://clinicaltrials.gov/; NCT02251743.Diversity & inclusion statementWe worked to ensure sex and gender balance in the recruitment of human participants. We worked to ensure race, ethnic, and/or other types of diversity in the recruitment of human participants. We worked to ensure that the study questionnaires were prepared in an inclusive way. One or more of the authors of this paper self-identifies as a member of one or more historically underrepresented sexual and/or gender groups in science. We actively worked to promote sex and gender balance in our author group.

Project description:Volumetric studies have reported relatively decreased cortical thickness and gray matter volumes in adults with attention-deficit/hyperactivity disorder (ADHD) whose childhood status was retrospectively recalled. We present, to our knowledge, the first prospective study combining cortical thickness and voxel-based morphometry in adults diagnosed as having ADHD in childhood.To test whether adults with combined-type childhood ADHD exhibit cortical thinning and decreased gray matter in regions hypothesized to be related to ADHD and to test whether anatomic differences are associated with a current ADHD diagnosis, including persistent vs remitting ADHD.Cross-sectional analysis embedded in a 33-year prospective follow-up at a mean age of 41.2 years.Research outpatient center.We recruited probands with ADHD from a cohort of 207 white boys aged 6 to 12 years. Male comparison participants (n = 178) were free of ADHD in childhood. We obtained magnetic resonance images in 59 probands and 80 comparison participants (28.5% and 44.9% of the original samples, respectively).Whole-brain voxel-based morphometry and vertexwise cortical thickness analyses.The cortex was significantly thinner in ADHD probands than in comparison participants in the dorsal attentional network and limbic areas (false discovery rate < 0.05, corrected). In addition, gray matter was significantly decreased in probands in the right caudate, right thalamus, and bilateral cerebellar hemispheres. Probands with persistent ADHD (n = 17) did not differ significantly from those with remitting ADHD (n = 26) (false discovery rate < 0.05). At uncorrected P < .05, individuals with remitting ADHD had thicker cortex relative to those with persistent ADHD in the medial occipital cortex, insula, parahippocampus, and prefrontal regions.Anatomic gray matter reductions are observable in adults with childhood ADHD, regardless of the current diagnosis. The most affected regions underpin top-down control of attention and regulation of emotion and motivation. Exploratory analyses suggest that diagnostic remission may result from compensatory maturation of prefrontal, cerebellar, and thalamic circuitry.

Dataset Information

A 6-year follow-up of a large European cohort of children with attention-deficit/hyperactivity disorder-combined subtype: outcomes in late adolescence and young adulthood.

Publications

A 6-year follow-up of a large European cohort of children with attention-deficit/hyperactivity disorder-combined subtype: outcomes in late adolescence and young adulthood.

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