Evidence map›Paper›PMID 40082855›Full record

ArticleBMC public health2025

Development and validation of medication literacy scale for adults: MELSA version II.

Betul Okuyan, Berkan Atasoy, Ercan Kulak, Goktug Gorpuz, Mesut Sancar, Pınar Ay

Abstract readValidation Study
In one paragraph

Article in BMC public health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Trial
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Betul OkuyanClinical Pharmacy Department, Faculty of Pharmacy, Marmara University, Istanbul, Türkiye. betulokuyan@yahoo.com.
Berkan AtasoyHealth Science Institute, Faculty of Pharmacy, Marmara University, Istanbul, Türkiye.
Ercan KulakDistrict Health Directorate, Istanbul, Türkiye.
Goktug GorpuzClinical Pharmacy Department, Faculty of Pharmacy, Marmara University, Istanbul, Türkiye.
Mesut SancarClinical Pharmacy Department, Faculty of Pharmacy, Marmara University, Istanbul, Türkiye.
Pınar AyDepartment of Public Health, School of Medicine, Marmara University, Istanbul, Türkiye.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe Medication Literacy Scale for Adults (MELSA) version I was previously developed among adults with high educational levels. However, the validity of the tool for the general populations was not established.

objectiveThe aim of the study was to develop and evaluate the psychometric properties of the MELSA version II among community-dwelling Turkish adults with both low and high education levels.

methodsAfter the item development and content and face validity testing, test-retest reliability, explanatory factor analysis (EFA), confirmatory factor analysis (CFA), internal consistency, item response theory approach (Rasch analysis), and hypothesis testing were carried out.

resultsThe interclass correlation coefficient (agreement) was 0.753 between the test and the two weeks retest. Kuder Richardson-20 was 0.89 with a unidimensional structure, according to EFA, CFA, and Rasch analysis. Rasch analysis indicated the person reliability of the 9-item MELSA version II as 0.74. Participants with a high education level and a high level of self-reported reading ability for health-related information had a higher score on MELSA version II (p < 0.05).

conclusionThe 9-item MELSA version II is a web-based scale that is brief, valid, and easy to administer in person using an mobile device. It could be used in different countries and populations after conducting appropriate translation and cultural adaptation.

Indexed as

Health LiteracyAdultAgedEducational StatusFactor Analysis, StatisticalFemaleHumansMaleMiddle AgedPsychometricsReproducibility of ResultsSurveys and QuestionnairesTurkeyYoung AdultFactor analysisItem response theoryMedication literacyPsychometricsRaschValidity and reliability

Identifiers

PMID40082855
PMCPMC11905497

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.