Development and Validation of a Tool for Measuring Knowledge, Attitude, and Behavior Regarding Unused Household Medicine Management

Background: Today, one of the environmental problems in the world is pharmaceutical waste, which has the potential to be hazardous, toxic, and pathogenic with a long half-life and cumulative properties. This study aimed to develop and validate a tool to measure knowledge, attitude, and behavior of household pharmaceutical waste disposal in urban households. Methods: The initial items of the questionnaire were developed based on existing guidelines, standards,literature, andexperts' opinions. Content validity ratio (CVR) and content validity index (CVI) were used to confirm the content validity of the tool. Item impact score was used to determine  face validity. The internal consistency of the instrument was evaluated using  Cronbach's alpha. Test-retest analysis was used for examining over time consistency. All the data were analyzed using SPSS version ۲۱. Results: Based on the results of CVI, CVR, and impact scores, ۳۶ items remained. The tool's internal consistency and over time consistency were confirmed with Cronbach's alpha coefficient of ۰.۸۲ and correlation coefficient of ۰.۹, respectively. Conclusion: The results indicated  proper psychometric properties of the questionnaire and confirmed that it is valid for measuring urban households' knowledge, attitude, and behavior about the disposal of pharmaceutical waste.