Clinical trial Recruiting at 1 site Observational Ages 10 and up

Investigating the impact of dietary guidelines on well-being in patients with Phenylketonuria

Official title: Metabolic Control and Patient Well-being in Phenylketonuria: do Guidelines Make a Difference?

Run by University Children's Hospital, Zurich · NCT05128149 · Data updated 2026-11-12

This study looks at how following dietary guidelines affects the health and well-being of people with Phenylketonuria (PKU) who are 10 years and older.

More Phenylketonurias trials

Quick facts

Study typeObservational
Ages10 Years and up
SexAll
Enrollment200 (estimated)
SponsorUniversity Children's Hospital, Zurich
Academic / other
Locations1 site (Zurich)
StatusRecruiting
StartedNovember 15, 2021
Main results expectedMarch 30, 2025
Study endsDecember 31, 2025
Registry record updatedApril 13, 2025
Trial IDNCT05128149 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include patients aged 10 years and older with Phenylketonuria requiring dietary or pharmacological treatment.

Probably not a fit

Patients with mild forms of PKU or those not requiring dietary treatment may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study examines how adherence to dietary guidelines affects metabolic control and health-related quality of life (HrQol) in patients with Phenylketonuria (PKU). It aims to understand the variability in treatment adherence and the factors influencing well-being, such as self-efficacy and parenting stress. The study will involve patients aged 10 years and older who require dietary or pharmacological treatment according to local guidelines, and it will gather data through questionnaires. By comparing outcomes across different treatment centers, the study seeks to identify best practices in managing PKU.

Why it matters

Potential benefit: If successful, this study could lead to improved dietary guidelines that enhance the quality of life for PKU patients.

How similar studies have gone: While there have been studies on dietary adherence in chronic diseases, this specific approach to PKU treatment guidelines is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:- Patients with PKU from age 10 years requiring dietary and / or pharmacological treatment according to locally applied guidelines

* Parents of patients with PKU aged 10 to 18 years requiring dietary and / or pharmacological treatment according to locally applied guidelines
* Ability and willingness to answer the questionnaires and follow the study procedures
* Informed consent as documented by signature

Exclusion criteria for patients and parents :

* Inability to follow the procedures of the study, e.g. due to language problems or severely reduced health status
* Pregnant patients or patients who have disclosed to their physician that they are planning a pregnancy in the near future
* Hyperphenylalaninaemia or mild forms of PKU or other inborn errors associated with elevated Phe but not requiring dietary and / or pharmacological treatment according to locally applied guidelines
* No inform

Where it's running

  • University Childrens Hospital Zürich
    Zurich, Switzerland
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.