Cross-Cultural Adaptation and Psychometric Testing of the Portuguese Version of the Iceland-Family Illness Beliefs Questionnaire.

Only 237 of 507 invited parents completed all items, so families who did not participate may differ. The sample included many different chronic conditions, so results may not apply to a specific illness. Only 34 participants repeated the questionnaire, so the stability evidence is limited. The RMSEA upper limit exceeded the recommended value, so model fit was not uniformly strong. The authors note that advanced family nursing practice is not common in Portuguese pediatric settings, so real-world use may differ. The study tested a questionnaire, not whether asking families about illness beliefs changes care or outcomes.

The authors declared no potential conflicts of interest. An author was supported by a grant from the Foundation for Science and Technology, grant number UI/BD/151515/2021.

Do not read this as evidence that using the questionnaire improves family health or that parents' illness beliefs cause suffering. The study tested whether a measurement tool worked in Portuguese parents; it did not test an intervention or patient outcome.