Development and content validation of the medication literacy test for older adults (TELUMI)

• Published in: Archives of gerontology and geriatrics Vol. 112; p. 105027
• Main Authors: Pantuzza, Laís Lessa Neiva, do Nascimento, Elizabeth, Botelho, Stephanie Ferreira, da Rocha, Ana Luiza Pereira, Martins, Maria Auxiliadora Parreiras, do Nascimento, Mariana Martins Gonzaga, Vieira, Liliana Batista, Veloso, Ronara Camila de Souza Groia, Reis, Adriano Max Moreira
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01-09-2023
• Subjects: Aged; Content validity; Health Literacy; Humans; Instrument development; Psychometrics; Reproducibility of Results; Surveys and Questionnaires; Instrument development; Content validity; Health literacy
• ISSN: 0167-4943; 1872-6976
• DOI: 10.1016/j.archger.2023.105027

•TELUMI is an instrument developed to measure medication literacy in older adults.•TELUMI covers the functional, communicative, critical and numeracy dimensions.•TELUMI have adequate content validity to measure medication literacy.
Medication literacy comprises the skills needed to access, understand, and act on medication information. Low medication literacy is frequent among older adults, making them more susceptible to negative health outcomes. The aim of this study was to develop and evaluate the content validity of an instrument to measure medication literacy in this population.
Multistage methodological study. Items were generated according to a conceptual model and a literature review. The instrument was submitted to a panel of experts to assess item's relevance, clarity, and theoretical classification. Subsequently, the instrument was applied to the target population to assess its comprehensibility.
Content Validity Index results indicated excellent agreement among experts on the instrument's relevance (0.98) and clarity (0.91). Overall agreement between experts regarding the theoretical subdimensions was moderate [Fleiss’ kappa=0.57 (p = 0.00)]. Items were reported to be fully understood by most representatives of the target population. The final version of the instrument had 33 items divided into eight scenarios of medication use.
The instrument seems to have adequate content validity and good suitability for the target population. Therefore, it can help health professionals to identify older adults with low medication literacy, aiming to improve their medication use skills.