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Medication literacy in Spanish and English: psychometric evaluation of a new assessment tool
John A Sauceda1, Amanda M Loya, Jeri J Sias
1Department of Psychology, University of Texas at El Paso, 79902, USA. jasauceda@miners.utep.edu
Objective:
To evaluate the psychometric properties of a newly developed Medication Literacy Assessment in Spanish and English (MedLitR xSE).
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 MedLitR xSE tool showed adequate internal consistency and reliability, and CFA revealed overall good model fit. In phase 2, the shorter 14-item MedLitR xSE 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 MedLitR xSE tool demonstrated good psychometric properties. This tool may provide a new option to assess "medication literacy" in English and Spanish.
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