Hispanic Infants with cystic fibrosis show low CFTR mutation detection rates in the Illinois newborn screening...

Area of Science:

• Medical Genetics
• Pediatric Screening
• Public Health

Background:

• Newborn screening protocols for cystic fibrosis (CF) are tailored to specific populations.
• Disparities in mutation detection rates may exist between different ethnic groups.

Purpose of the Study:

• To investigate differences in cystic fibrosis mutation distribution and detection rates between Hispanic and non-Hispanic infants screened in Illinois.
• To assess the impact of limitations in newborn screening panels on CF diagnosis in diverse populations.

Main Methods:

• Retrospective review of Illinois newborn screening data for CF cases.
• Analysis of mutation detection rates and undefined mutations in Hispanic versus non-Hispanic Caucasian infants.
• Statistical comparison of CF diagnosis risk based on identified mutations.

Main Results:

• Hispanic infants with CF were significantly more likely to have one or more mutations undetected by the Illinois newborn screening panel (40% vs. 9.5%).
• The risk of a positive CF diagnosis with only one identified mutation was doubled in Hispanic Caucasian infants compared to non-Hispanic Caucasian infants (5% vs. 2.4%).

Conclusions:

• Current cystic fibrosis newborn screening panels may have limitations in detecting all disease-causing mutations in Hispanic populations.
• Healthcare providers require heightened awareness of these screening limitations to ensure comprehensive genetic counseling and timely diagnostic follow-up for all infants, irrespective of initial screening results.