https://www.selleckchem.com/pr....oducts/rp-102124.htm
To evaluate the validity, reliability, and performance of the Health Assessment Questionnaire-II(HAQ-II) Spanish version questionnaire to measure physical function. A cross-sectional study of 496 patients with rheumatoid arthritis, distributed in 2 samples. The construct validity was evaluated employing the confirmatory factor analysis and the validity based on the relationship with other variables. Cronbach's alpha (α) and McDonald's omega (ω) coefficient were used to determine reliability. Item performance was analysed by fitting di