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Psychometric properties of the Functional Literacy Questionnaire among Portuguese adolescents

2024Journal article Open access
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dc.contributor.authorMartins, Raquel
dc.contributor.authorCapitão, Carolina
dc.contributor.authorFeteira-Santos, Rodrigo
dc.contributor.authorVirgolino, Ana
dc.contributor.authorSantos, Osvaldo
dc.date.accessioned2025-02-14T16:17:25Z
dc.date.available2025-02-14T16:17:25Z
dc.date.issued2024
dc.descriptionCopyright: © 2024 Martins et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.pt_PT
dc.description.abstractBackground: Robust tools to assess self-reported adolescent functional health literacy are lacking. In Portugal, the only available tool is the Newest Vital Sign for Portuguese adolescents (NVS-PTeen), though presenting modest validity and reliability properties. A new instrument-the Functional Literacy Questionnaire (FLiQ)-was developed, inspired by the NVS-PTeen, but following the European Regulation for food labeling and targeting a balanced assessment of numeracy and verbal comprehension skills. This study aimed to evaluate several psychometric properties of the FLiQ when administered to Portuguese adolescents. Methods: We conducted a longitudinal observational study with three phases: (1) Delphi panel with health literacy experts; (2) self-administration of FLiQ and NVS-PTeen to adolescents in 7th to 9th grades; and (3) re-administration of FLiQ four weeks after baseline, to the same group of participants. Results: FLiQ's content validity was excellent, with an Average-Content Validity Index of .95. Overall, 372 adolescents (50.3% girls) aged between 12-17 years (median age: 13) participated in the study. Of these, 150 completed the test-retest assessment. Internal consistency was good (Kuder-Richardson Fornula-20 = .70), as well as test-retest reliability (Intraclass Coefficient Correlation = .82). FLiQ total score was weakly correlated with the school year (rho = .174), and moderately with Portuguese (rho = .348) and Mathematics grades (rho = .333). Factor analysis indicated a two-dimension structure, reflecting numeracy and verbal comprehension skills. Item response theory analysis revealed differences in difficulty and discrimination capacity among items, all with adequate fit values. Conclusion: FLiQ is a valid and reliable tool. It can be used to monitor functional health literacy levels in Portuguese adolescents.pt_PT
dc.description.sponsorshipThis work was supported by funds from Fundação para a Ciência e a Tecnologia (grants UIDB/04295/2020 and UIDP/04295/2020).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPLoS One. 2024 Oct 8;19(10):e0306802pt_PT
dc.identifier.doi10.1371/journal.pone.0306802pt_PT
dc.identifier.eissn1932-6203
dc.identifier.urihttp://hdl.handle.net/10400.5/98457
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherPlospt_PT
dc.relation.publisherversionhttps://journals.plos.org/plosone/pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titlePsychometric properties of the Functional Literacy Questionnaire among Portuguese adolescentspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Base/UIDB%2F04295%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Programático/UIDP%2F04295%2F2020/PT
oaire.citation.issue10pt_PT
oaire.citation.titlePLOS ONEpt_PT
oaire.citation.volume19pt_PT
oaire.fundingStreamConcurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017/2018) - Financiamento Base
oaire.fundingStreamConcurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017/2018) - Financiamento Programático
person.familyNameMartins
person.familyNameda Silva Gaspar de Areia Capitão
person.familyNameFeteira-Santos
person.familyNameVirgolino
person.familyNameSantos
person.givenNameRaquel
person.givenNameCarolina
person.givenNameRodrigo
person.givenNameAna
person.givenNameOsvaldo
person.identifier1058633
person.identifier.ciencia-id191B-38D7-A7BF
person.identifier.ciencia-id741A-8A14-36F5
person.identifier.ciencia-id131E-4522-0C13
person.identifier.ciencia-id1A10-C261-AC8E
person.identifier.orcid0000-0002-6192-2266
person.identifier.orcid0000-0002-4614-0549
person.identifier.orcid0000-0002-5780-2288
person.identifier.orcid0000-0003-0428-6643
person.identifier.orcid0000-0002-0836-4314
person.identifier.scopus-author-id57215793508
person.identifier.scopus-author-id56538593800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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