Objectives. Dietary treatment in phenylketonuria (PKU) is known to cause eating problems, but knowledge of both prevalence and magnitude, especially for social restrictions, is scarce. Our aim was to evaluate the social restrictions and eating problems that children with PKU and their caregivers experience with dietary treatment. Methods. A web-based questionnaire, based on the Behavioral Pediatrics Feeding Assessment Scale with additional PKU-specific questions, was developed in close collaboration with and distributed by the Dutch PKU Association, which sent an e-mail to its members containing a link to the questionnaire. The questionnaire was completed by caregivers of children with PKU in the Netherlands and caregivers of age-matched children without PKU. Data were analyzed with the Kruskal-Wallis and Mann-Whitney U test using SPSS. Results. Compared with caregivers of children in the control group (ages 1-16 y; n = 50), caregivers of children with PKU (ages 1-16 y; n = 57) reported more...

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