Universal screening for familial hypercholesterolemia in 2 populations

Area of Science:

• Genetics
• Cardiovascular Health
• Public Health

Background:

• Familial hypercholesterolemia (FH) is a prevalent genetic disorder leading to premature cardiovascular disease.
• Over 2 million individuals in Europe remain undiagnosed for FH.
• Early diagnosis and intervention in childhood are critical for preventing long-term health consequences.

Purpose of the Study:

• To evaluate the performance of two distinct familial hypercholesterolemia (FH) screening programs in children.
• To compare universal screening with opt-out versus opt-in participation models.
• To assess the feasibility and effectiveness of childhood FH screening strategies.

Main Methods:

• Analysis of data from two independent populations, screening over 166,000 individuals.
• Genetic analysis of FH-related genes in 945 children and 99 parents.
• Comparison of opt-out and opt-in universal screening approaches for FH detection.

Main Results:

• 32.3% of children screened had a positive genotype or variant of uncertain significance in FH genes.
• Sensitivity and specificity for FH confirmation using LDL cholesterol levels were 90.5% and 55.3%.
• The opt-out universal screening program estimated an FH prevalence of 1 in 431, with high parent participation.

Conclusions:

• A universal 3-step FH screening approach effectively detects affected children and their families across generations cost-effectively.
• The opt-out screening strategy demonstrates potential preference over opt-in for broader FH detection in pediatric populations.
• Early identification through universal screening facilitates timely management of FH.