Cascade Genetic Testing of Familial Hypercholesterolemia (CATCH)

Cascade Genetic Testing of Familial Hypercholesterolemia: the CATCH Multicenter Randomized Controlled Trial

Familial hypercholesterolemia (FH) is a frequent genetic disorder (1/200) associated with an increased risk of early-onset myocardial infarction. To improve detection and treatment of patient with FH, cascade genetic testing in families is recommended by many cardiovascular prevention guidelines. However, the implementation of national genetic cascade screening is challenging, because legal protection to guarantee privacy of data do not authorize physicians to directly contact at-risk relatives. Using current mobile information technologies and a centralized web-based platform, we designed an ethical genetic cascade screening program for FH to be tested in Switzerland.

Study Overview

• Status: Completed
• Conditions: Familial Hypercholesterolemia
• Intervention / Treatment: Other: web-based centralized service and message

• Study Type: Interventional
• Enrollment (Actual): 379
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Switzerland
  • Lausanne, Switzerland, 1011
    • Center for primary care and public health (Unisanté), University of Lausanne

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 5 years and older (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• patients with severe hypercholesterolemia and familial or personal history of early-onset cardiovascular disease = Dutch Lipid Clinic Network score (DLNC) >= 6 points.

Exclusion Criteria:

• Patients without at least one contactable first-degree family members

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Screening
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Monogenic positive FH, direct contact	Other: web-based centralized service and message; Perform three cycles of cascade screening through several generation of family members of an index case. The contact of relatives will be initiated by the index case and supported by a web-based centralized service. The index case will be provided with a prepared email or Whatsapp message that the index case can further forward to his first-degree relatives. The email/message will contain a link to a secured web application with a code for the connection. By clicking on the link, the relative will connect to a specifically designed app. The app will provide information about the transmission mode of FH, the cardiovascular risk associated with FH and the way how to reduce this risk. The relative can then fill out information and provide agreement to be contacted for the study. The nearest specialized clinic will then contact the relative to organize further screening with similar processes.
No Intervention: Monogenic positive FH, usual care
Experimental: Monogenic negative FH, direct contact	Other: web-based centralized service and message; Perform three cycles of cascade screening through several generation of family members of an index case. The contact of relatives will be initiated by the index case and supported by a web-based centralized service. The index case will be provided with a prepared email or Whatsapp message that the index case can further forward to his first-degree relatives. The email/message will contain a link to a secured web application with a code for the connection. By clicking on the link, the relative will connect to a specifically designed app. The app will provide information about the transmission mode of FH, the cardiovascular risk associated with FH and the way how to reduce this risk. The relative can then fill out information and provide agreement to be contacted for the study. The nearest specialized clinic will then contact the relative to organize further screening with similar processes.
No Intervention: Monogenic negative FH, usual care

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
the yield of detection of familial hypercholesterolemia (FH)	The yield of detection is the number of test performed/number of contactable relatives.	2 years

Collaborators and Investigators

• Sponsor: Center for Primary Care and Public Health (Unisante), University of Lausanne, Switzerland
• Collaborators: Swiss Heart Foundation
• Investigators: Principal Investigator: David Nanchen, MD, Center for Primary Care and Public Health (Unisante), University of Lausanne, Switzerland

Study record dates

Study Major Dates

• Study Start (Actual): November 10, 2020
• Primary Completion (Actual): December 31, 2023
• Study Completion (Actual): December 31, 2023

Study Registration Dates

• First Submitted: June 3, 2020
• First Submitted That Met QC Criteria: June 3, 2020
• First Posted (Actual): June 5, 2020

Study Record Updates

• Last Update Posted (Estimated): January 18, 2024
• Last Update Submitted That Met QC Criteria: January 16, 2024
• Last Verified: January 1, 2024

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Metabolic Diseases; Genetic Diseases, Inborn; Metabolism, Inborn Errors; Lipid Metabolism Disorders; Hyperlipidemias; Dyslipidemias; Lipid Metabolism, Inborn Errors; Hyperlipoproteinemias; Hypercholesterolemia; Hyperlipoproteinemia Type II
• Other Study ID Numbers: 2020-01271

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No