Construction and Validity of an Item Bank on Risk Self-Medication

Abstract

Objective: to construct an item bank to measure risk self-medication and assess its content validity. Method: this is a methodological study carried out from May to October 2022, with two phases: 1) item bank elaboration in the light of medication literacy and Theory of Planned Behavior based on a scoping review; and 2) content validity by twenty-two health experts. The Content Validity Index, Content Validity Ratio, binomial exact test for small samples and intraclass correlation coefficient were calculated. Results: Risk Self-Medication construct item elaboration was based on a broad review of solidified national and international publications in the health area. The definitions were approved by judges, with their respective domains. In the first version, the bank contained 136 items. Two rounds of analysis were carried out with judges, which resulted in the removal of 87 items. The final version presented 49 items, distributed across three domains: Medication literacy; Behavioral intention; and Behavior. The total Content Validity Index was 0.89, with excellent reliability (0.964). There was significant disagreement in the attribution of scores among judges (p>0.05) in some items. Conclusion: the item bank has satisfactory content. It is recommended to undergo semantic analysis and subsequent structure validity.