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

• Egile Nagusiak: Stavrakidou M (Egilea), Sandstedt E (Egilea), Scott J (Egilea), Berggren K (Egilea), Maillard S (Egilea), Nørgaard M (Egilea), Ünal E (Egilea), Groen W (Egilea), van der Net J (Egilea)
• Formatua: Liburua
• Argitaratua: BMC, 2010-05-01T00:00:00Z.
• Gaiak: article
• Sarrera elektronikoa: 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...