133347 20260217205459.0 doi 10.3390/jcm13061662 sideral 138065 ART-2024-138065 eng Martínez-González, Agustín Ernesto Psychometric properties of the gastrointestinal symptom severity scale in a sample of adolescents and young adults 2024 Access copy available to the general public Unrestricted Background: Functional gastrointestinal disorders (FGIDs) are a set of chronic or recurrent gastrointestinal symptoms (GS) with great psychobiological complexity. The appearance of FGIDs harms quality of life and drains medical resources. Methods: Psychometric properties of the Gastrointestinal Symptom Severity Scale (GSSS) based on Rome IV criteria were examined in a sample of 1247 individuals with typical development. Observations were randomly divided into two subsets, namely, subsample 1 (n = 624) and subsample 2 (n = 623). Exploratory factor analysis (EFA) was performed with data from subsample 1, whilst confirmatory factor analysis (CFA) was performed with data from subsample 2. Internal consistency of the scale was assessed for the whole dataset according to ordinal alpha, whilst four-week reliability was measured according to the intraclass correlation coefficient (ICC). Measurement invariance as a function of sex was also examined, and discriminant–convergent validity of the GSSS was examined through hypothesis testing. Results: EFA revealed a two-factor structure with a moderate percentage of explained variance (51.3%), whilst CFA exhibited an excellent fit of the data to the model. A one-factor CFA model demonstrated an acceptable but slightly lower fit. Internal consistency was moderate and test–retest reliability was deemed adequate. Metric invariance was demonstrated as a function of sex. Hypothesis testing demonstrated strong convergent–discriminant validity with measures of sensory sensitivity, obsessive–compulsive symptoms, and pain. Conclusions: The GSSS is a tool with acceptable and promising psychometric properties when administered to neurotypical adolescents and young adults. The self-report GSSS may promote better understanding of GS involvement in the gut microbiota–brain axis in the general population. info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 2.9 2024 MEDICINE, GENERAL & INTERNAL 65 / 332 = 0.196 2024 Q1 T1 0.919 2024 Medicine (miscellaneous) 2024 Q1 5.2 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Montoro-Pérez, Néstor Wallace, Agustín Pérez-Sánchez, Susana Piqueras, José A. Infante-Cañete, Lidia Hidalgo-Berutich, Silvia Rodríguez-Jiménez, Tíscar Universidad de Zaragoza Andreo-Martínez, Pedro 4009 680 Universidad de Zaragoza Dpto. Psicología y Sociología Área Person.Eval.Trat.Psicoló. 13, 6 (2024), 13 pp. J. clin.med. Journal of Clinical Medicine 2077-0383 918983 http://zaguan.unizar.es/record/133347/files/texto_completo.pdf Versión publicada 2750474 http://zaguan.unizar.es/record/133347/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:133347 articulos driver 2026-02-17-20:21:22 ARTICLE