RT Journal Article T1 Cross-Cultural Adaptation and Psychometric Testing of the Portuguese Version of the Iceland-Family Illness Beliefs Questionnaire A1 Lemos, Sara A1 Andrade, Luísa A1 Lima, Lígia A1 Martins, Teresa A1 Svavarsdottir, Erla Kolbrun A1 Barbieri Figueiredo, Maria do Céu AB Illness beliefs have a role in the adaptation, coping, well-being, healing, and recovery in families of children/adolescents with chronic illness. The assessment of family illness beliefs can support family nursing interventions that address the suffering of family members when illness arises. The purpose of this study was to translate, cross-culturally adapt, and psychometrically test the Portuguese version of the Iceland-Family Illness Beliefs Questionnaire. A sample of 237 parents of children/adolescents who experienced chronic health conditions completed the online questionnaire. The original factor model was tested through confirmatory factorial analysis. The results showed satisfactory model fit indices (χ2/gl = 3.004; comparative fit index [CFI] = 0.90; root mean square error of approximation [RMSEA] = 0.092) and internal consistency (Cronbach's α = 0.74). The instrument showed good psychometric characteristics of validity and reliability, suggesting it may be useful in the assessment of illness beliefs in families experiencing a pediatric chronic illness. PB Sage SN 1074-8407 SN 1552-549X (electrónico) YR 2024 FD 2024 LK https://hdl.handle.net/10272/23708 UL https://hdl.handle.net/10272/23708 LA eng NO The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: S.L. was supported by a grant from FCT-Foundation for Science and Technology (No. UI/BD/151515/2021). DS Repositorio Institucional de la Universidad de Huelva RD 31 may 2026