Abstract
The purpose of this study is to develop a valid and reliable tool for assessing factors affecting recommendation of over-the-counter drugs from pharmacy staff. A total of 422 pharmacy staff took part in this study. Exploratory factor analysis, confirmatory factor analysis, and Rasch analysis were used to evaluate construct validity and reliability of a questionnaire. The results showed that the questionnaire had acceptable construct validity (CMIN/df = 2,95; RMSEA = 0,07; SRMR = 0,06; CFI = 0,89; GFI = 0,92; Infit and Outfit MNSQ: 0,77-1,24; PTMEA CORR: 0,20-0,41) and good overall internal reliability (Cronbach's alpha = 0,73). The developed questionnaire has great practical significance and potential for studying the preferences of pharmacists when recommending over-the-counter drugs.
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