Comparing different revisions of the Childhood Health Assessment Questionnaire to reduce the ceiling effect and improve score distribution: Data from a multi-center European cohort study of children with JIA

• Main Authors: Stavrakidou M (Author), Sandstedt E (Author), Scott J (Author), Berggren K (Author), Maillard S (Author), Nørgaard M (Author), Ünal E (Author), Groen W (Author), van der Net J (Author)
• Format: Book
• Published: BMC, 2010-05-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

<p>Abstract</p> <p>Background</p> <p>The original version of the Childhood Health Assessment Questionnaire (CHAQ30orig) suffers from a ceiling effect and hence has reduced clinical validity. The purpose of this study was to evaluate the effect of adding eight more deman...