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Published on: August 29, 2025
A sweat test centered protocol for the disclosure and diagnosis of cystic fibrosis in a newborn screening program
I J M Doull1, S J Hall, D M Bradley
1Respiratory/Cystic Fibrosis Unit, Children's Hospital for Wales, Cardiff, Wales, United Kingdom. doullij@cf.ac.uk
Insights
This study presents a new sweat test protocol for early Cystic Fibrosis (CF) diagnosis in newborns. The protocol balances timely identification with parental support, showing high satisfaction rates.
Area of Science:
- Medical Diagnostics
- Pediatric Health
- Genetic Disorders
Background:
- Cystic Fibrosis (CF) is a genetic disorder requiring early detection for optimal management.
- Newborn screening protocols aim to identify infants with CF shortly after birth.
- Parental anxiety and the diagnostic timeline are critical considerations in CF screening.
Purpose of the Study:
- To develop and evaluate a sweat test-centered protocol for Cystic Fibrosis diagnosis in newborns.
- To optimize the early identification of infants with CF while minimizing parental uncertainty.
- To assess parental satisfaction with the disclosure and diagnostic process.
Main Methods:
- Implementation of a sweat test-centered protocol for newborn screening over a 9-year period.
- Screening of 295,247 newborn infants for Cystic Fibrosis.
- Analysis of diagnostic outcomes, including false negative rates.
Main Results:
- 121 infants were diagnosed with Cystic Fibrosis.
- A false negative rate of 3.3% (4 cases) was observed during the study period.
- High parental satisfaction was reported 6 months after disclosure.
Conclusions:
- The developed sweat test protocol facilitates early and effective diagnosis of Cystic Fibrosis in newborns.
- The protocol successfully balances the need for prompt diagnosis with sensitive communication to parents.
- The findings support the high parental satisfaction with the implemented screening and disclosure process.
Abstract:
We describe the development of a sweat test centered protocol for disclosure and diagnosis of Cystic Fibrosis. Our protocol aims to identify infants early, minimizes the time of uncertainty for the parents, and yet gives them time to begin to come to terms with the possibility of diagnosis. Over a 9-year period 295,247 newborn infants were screened for CF in Wales, of whom 121 infants were diagnosed as having CF. During this period there were four false negatives (3.3%). Parental satisfaction with the process appears very high 6 months after disclosure.
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