Validation of the Health Assessment Questionnaire disability index in patients with gout.

Objective: To assess the psychometric properties of the Health Assessment Questionnaire (HAQ) disability index (DI) in patients with gout.

Methods: This study was conducted in a multicenter cohort of patients with gout whose data were collected at baseline (time 0) and 6 months later (time 6). Reliability was assessed by test-retest reliability (intraclass correlation coefficient [ICC]) and internal consistency (Cronbach's alpha coefficient).