ADHD and the QbTest: Diagnostic Validity of QbTest. Issue 11 (September 2018)

• Record Type: Journal Article
• Authors: Hult, Nicklas; Kadesjö, Josefin; Kadesjö, Björn; Gillberg, Christopher; Billstedt, Eva
• Is Part Of: Journal of attention disorders. Volume 22:Issue 11(2018)
• Page Start: 1074
• Page End: 1080
• Publication Date: 2018-09
• Subjects: QbTest -- inattention -- hyperactivity -- impulsivity -- attention deficit/hyperactive disorder -- ASD -- diagnosis; Attention-deficit hyperactivity disorder -- Periodicals; Attention -- Periodicals; 616.8589
• DOI: 10.1177/1087054715595697
• Languages: English
• ISSNs: 1087-0547

Abstract

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.