Developmentand Validation of a Questionnaire about Patient Knowledge of Adverse Effects of Statins

Abstract

The questionnaire showed satisfactory internal consistency, with Cronbach's alpha of 0.898, good construction and homogeneity of questions. After splitting the questionnaire to two parts at random, Cronbach's alphas were 0.834 and 0.842 for the both parts, respectively. Exploratory factorial analysis revealed two domains. The patients rated their knowledge of the side effects of statins 52.7±19.9 on the visual analogue scale.Based on the results of this study, we believe that this questionnaire could be a useful tool for testing the knowledge of patients about adverse effects of statins and help physicians to identify patients with insufficient knowledge who should be additionally informed about it.