The Portuguese version of the Childhood Health Assessment Questionnaire (CHAQ) and the Child Health Questionnaire (CHQ)

We report herein the results of the cross-cultural adaptation and validation into the Portuguese language of the parents version of two health related quality of life instruments. The Childhood Health Assessment Questionnaire (CHAQ) is a disease specific health instrument that measures functional ability in daily living activities in children with juvenile idiopathic arthritis (KA). The Child Health Questionnaire (CHQ) is a generic health instrument designed to capture the physical and psychosocial well being of children independently. from the underlying disease. The Portuguese CHAQ CHQ were fully validated with 3 forward and 3 backward translations. A total of 130 subjects were enrolled: 69 patients with JIA (32% systemic onset, 19% polyarticular onset, 26% extended oligoarticular subtype, and 23% persistent oligoarticular subtype) and 61 healthy children. The CHAQ clinically discriminated between healthy subjects and JIA patients, with the systemic, polyarticular and extended oligoa...