ADHD and the QbTest: diagnostic validity of QbTest

Hult, N., Kadesjö, J., Kadesjö, B., Gillberg, C. and Billstedt, E. (2018) ADHD and the QbTest: diagnostic validity of QbTest. Journal of Attention Disorders, 22(11), pp. 1074-1080. (doi: 10.1177/1087054715595697) (PMID:26224575)

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Objective: We assess the diagnostic accuracy of the QbTest, which measures the cardinal symptoms of ADHD. Method: The study group comprised 182 children (mean age about 10 years), of whom 124 had ADHD and 58 had other clinical diagnosis of which 81% had ASD. Results: Only QbTest parameters for inattention and hyperactivity differentiated between ADHD and other clinical diagnoses at the p ≤ .01 level, not for measures of impulsivity. Sensitivity ranged from 47% to 67% and specificity from 72% to 84%. Positive predictive value ranged from 41% to 86%, and negative predictive value from 43% to 86%. Area under the curve varied from .70 to .80. Conclusion: The ability of the individual QbTest parameters to identify ADHD was moderate. The test’s ability to discriminate between ADHD subtypes was unsatisfactory.

Item Type:Articles
Additional Information:Funding: The author(s) received no financial support for the research, authorship, and/or publication of this article.
Glasgow Author(s) Enlighten ID:Gillberg, Professor Christopher
Authors: Hult, N., Kadesjö, J., Kadesjö, B., Gillberg, C., and Billstedt, E.
College/School:College of Medical Veterinary and Life Sciences > School of Health & Wellbeing > Mental Health and Wellbeing
Journal Name:Journal of Attention Disorders
ISSN (Online):1557-1246
Published Online:29 July 2015

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