Validity and reliability of the Health Literacy Assessment Scale for adherence to drug treatment among diabetics

To prepare an instrument to evaluate health literacy with regard to adherence to drug treatment among diabetics, identify the validity of its content, and estimate its reliability. Pilot study, with the following stages of instrument construction: literature review, content validation, reliability estimation (internal consistency/Cronbach's alpha and reproducibility/Kappa). The validity of content was completed and presented alpha=0.77 and Kappa values ranged from 0.31 to 1.00. The instrument was approved regarding content validity, presented acceptable internal consistency and reproducibility. However, when applied, measurement errors it can produce must be considered.