Reliability and factor structure of the Short Problem Behaviors Assessment for Huntington's disease (PBA-s) in the TRACK-HD and REGISTRY studies

Research output: Contribution to journalArticle

  • External authors:
  • Jenny Callaghan
  • Cheryl Stopford
  • Natalie Arran
  • Marie-Francoise Boisse
  • Allison Coleman
  • Rachelle Dar Santos
  • Eve M Dumas
  • Ellen P Hart
  • Damian Justo
  • Gail Owen
  • Joy Read
  • Miranda J Say
  • Alexandra Durr
  • Blair R Leavitt
  • Raymund AC Roos
  • Sarah J Tabrizi
  • Anne-Catherine Bachoud-Levi
  • Catherine Bourdet
  • Erik van Duijn


The authors report the inter-rater reliability and factor structure of the Short Problem Behaviors Assessment (PBA-s), a semistructured interview to measure severity and frequency of behavioral problems in Huntington's disease. Video recordings of 410 PBA-s interviews were rescored by an independent rater, and Cohen's kappa calculated to assess inter-rater reliability. The mean kappa was 0.74 for severity and 0.76 for frequency scores, whereas weighted kappa (allowing scores to differ by 1 point) was 0.94 for severity and 0.92 for frequency scores. The results of factor analysis were consistent with previous studies using other measures. The authors conclude that the PBA-s is a reliable measure.

Bibliographical metadata

Original languageEnglish
Pages (from-to)59-64
Number of pages5
JournalThe Journal of Neuropsychiatry and Clinical Neurosciences
Issue number1
Publication statusPublished - 2015

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