https://www.selleckchem.com/products/n6022.html
Background The work productivity and activity impairment (WPAI) questionnaire is a fine linguistic validated tool to measure work productivity and activity impairment. Considering its capability, this study aimed to evaluate the validity of the Persian version of WPAI-AQ in asthmatics.Methods The standard forward-backward process was used to translate the English version of WPAI-AQ into Persian. The convergent validity and responsiveness were evaluated by analyzing the correlations between the Persian WPAI-AQ and the health outcomes, and
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