Title

Medication literacy in Spanish and English: Psychometric evaluation of a new assessment tool

Publication Date

1-1-2012

Publication Name

Journal of the American Pharmacists Association

Document Type

Article

Volume

52

Issue

6

DOI

10.1331/JAPhA.2012.11264

Abstract

Objective: To evaluate the psychometric properties of a newly developed Medication Literacy Assessment in Spanish and English (MedLitRxSE). Design: Descriptive, nonexperimental, cross-sectional study. Setting: El Paso, TX, from December 2006 to June 2009. Participants: 181 English- or Spanish-speaking adults. Intervention: Survey administered in two phases. Main outcome measures: Descriptive statistics, internal consistency, confirmatory factor analysis (CFA) and fit indices, and criterion-related validity. Results: The 20-item MedLitRxSE tool showed adequate internal consistency and reliability, and CFA revealed overall good model fit. In phase 2, the shorter 14-item MedLitRxSE showed good total test reliability and correlated well with the Short Test of Functional Health Literacy in Adults. Item response theory analyses showed no language bias and a one-dimensional (i.e., one factor) model of medication literacy. Conclusion: The initial and latest shorter version of the MedLitRxSE tool demonstrated good psychometric properties. This tool may provide a new option to assess "medication literacy" in English and Spanish.

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