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Global Assessment of Attention Deficit Hyperactivity Disorder : Examining Objective Measures of Hyperactivity, Impulsivity and Inattention in Adults

Edebol, Hanna, 1984- (författare)
Karlstads universitet,Avdelningen för psykologi,Karlstad University, Karlstad, Sweden
Norlander, Torsten, prof (preses)
Division of Psychology, Department of Clinical Neuroscience, Karolinska Institutet, Solna, Sweden,Evidens University College and Karolinska Institutet
Helldin, Lars, PhD, MD (preses)
the NU- health care, Trollhättan, Sweden
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Lindström, Leif, prof.emer. (preses)
Institution of Neuroscience, Department of Psychiatry, Uppsala University
Asherson, Philip, prof. (opponent)
MRC Social Genetic and Developmental Psychiatry, Institute of Psychiatry, King´s College, London
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 (creator_code:org_t)
ISBN 9789170634604
Karlstad : Karlstads universitet, 2012
Engelska 192 s.
Serie: Karlstad University Studies, 1403-8099 ; 2012:49
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)
Abstract Ämnesord
Stäng  
  • The aim of this thesis is to examine objective laboratory measures of Attention Deficit Hyperactivity Disorder (ADHD) in adult persons and to develop measures for diagnosis and treatment using a psychometric instrument called the Quantified Behavior Test Plus. The instrument objectively quantifies cardinal symptom manifestations in adult ADHD using motion tracking devices and continuous performance testing. Paper I-IV suggest that ADHD predisposes adult persons to perform poorer on continuous performance tasks and to have higher levels of motor activity while performing these tasks as compared to other clinical as well as non-clinical groups. Performance by adults with ADHD is normalized following stimulant treatment which implicates therapeutic effects and measures of response to treatment and remission for ADHD is suggested.Paper I concludes that the psychometric instrument needs to be calibrated with regard to adult ADHD and emphasizes the importance of a composite measure for the disorder. Paper II generates two new measures, the Weighed Core Symptom scale (WCS) - a composite measure of adult ADHD ranging from 0 to 100, and Prediction of ADHD (PADHD) - a categorical variable of the diagnostic status with good predictive power. A majority of participants with ADHD has low points on WCS (indicating high levels of symptoms) and a majority of non-ADHD normative participants has high points on WCS (indicating low levels of symptoms). Paper III examines WCS and PADHD among complex clinical groups with shared symptoms vis-à-vis ADHD. Here, findings from Paper II are replicated since participants with ADHD present the highest level of global symptoms, followed by participants with bipolar II disorder and borderline personality disorder, participant with diconfirmed ADHD and finally, non-clinical participants has the lowest level of global symptoms. In Paper IV, the measures are proposed as indications of response to treatment and remission after titration with stimulant treatment and WCS indicates response to small changes in dose level.The major findings of the present thesis may be summarized as the construction of two new objective measures for ADHD in adult persons with practical implications for diagnosis and treatment. Hyperactivity is the most specific marker of ADHD in both men and women, followed by the cognitive markers of inattention and impulsivity. The composite measure, WCS, quantifies the global amount of ADHD symptoms and provides the most sensitive measure for the disorder. PADHD and WCS may not replace a thorough neuropsychiatric assessment and further studies promoting diagnostic subtype stratification is suggested. Future studies may want to consider these measures in outcome-based investigations of treatment efficacy as well as in the study of neuropsychological endophenotypes. Practical implications include clinical strategies to enhance objectivity during assessment as well as optimizing beneficial effects of treatment and attaining remission.  

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Annan medicin och hälsovetenskap -- Övrig annan medicin och hälsovetenskap (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Other Medical and Health Sciences -- Other Medical and Health Sciences not elsewhere specified (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Psykiatri (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Psychiatry (hsv//eng)
SAMHÄLLSVETENSKAP  -- Psykologi -- Psykologi (hsv//swe)
SOCIAL SCIENCES  -- Psychology -- Psychology (hsv//eng)
SAMHÄLLSVETENSKAP  -- Psykologi (hsv//swe)
SOCIAL SCIENCES  -- Psychology (hsv//eng)

Nyckelord

Attention Deficit Hyperactivity Disorder
Objective measures
Adults
Psychometrics
Diagnosis
Treatment
Psykologi
Psychology
Psychology

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