The Nijmegen-Leiden-Amsterdam 2-tiered Care Path Study

NCT ID: NCT05712603

Last Updated: 2024-10-22

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

655 participants

Study Classification

OBSERVATIONAL

Study Start Date

2022-10-01

Study Completion Date

2024-10-15

Brief Summary

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Non-alcoholic fatty liver disease (NAFLD) is a liver disease, caused by storage of fat in the liver. The most-important risk-factors are being overweight, and disorders in sugar and cholesterol handling of the body. On average does around 30% of the population worldwide have any signs of fatty liver. Most people will not get severe complaints as a result of their fatty liver. But in some of them, the fat storage will lead to hepatitis. This causes damage to the liver which can eventually lead to scarring of the liver, and in some patients to cirrhosis. This possibly can cause liver failure, liver cancer, an several complaints which reduce the quality of life. There are several tests which can help in detecting scarring of the liver. However, the scientific world still does not know well enough which test works best and if they perhaps might work better if they are used together. In this study these questions will be investigated in order to design a care path which does several tests consecutively. The goal is that this will make it possible to easily detect a severely diseased liver and that this will eventually help to detect patients earlier so they can be treated earlier and complications of the disease might be reduced. Moreover, is the goal that this study will lead to a decrease in unnecessary referrals to a hepatologist, resulting in a reduction in invasive diagnostic interventions. Hospital specialists who think that their patient might be at risk for advanced liver disease, can refer a patient to this study. Participants will go to the hospital for one study visit where several tests will be done which are designed to detect liver scarring. Depending on the results, a participant will be referred to a hepatologist for more extensive diagnostics or referred back to the referring specialist with advice for management of the disease.

Detailed Description

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Background of the study:

Non-alcoholic fatty liver disease (NAFLD) is a disease of alarmingly increasing prevalence. Progression along the NAFLD spectrum often goes unnoticed since it is often asymptomatic. Awareness among health care workers and implementation of care paths to detect progressing NAFLD stages are limited. Without clear guidance papers or robust care pathways for risk stratification, the current diagnostic approach for NAFLD is highly variable, leading to both underdiagnosis of advanced stages of disease, andunnecessary referrals for mild stages of disease. This calls for a comprehensive care path consisting of non-invasive alternatives to detect those patients with severe cases of NAFLD. Particularly the use of a sequential, two-tiered care path algorithm is promising as it has the ability to detect underlying advanced cases of fibrosis, and has previously been shown to be cost-effective. This was shown by dr. Ankur Srivastava, who designed a pathway consisting of FIB4-score and ELF-test that led to a reduction of unnecessary referrals to the hepatologist by 80%, whilst improving the detection of advanced fibrosis and cirrhosis 5- and 3-fold,respectively (8). In this study the investigation of several two-tiered sequential care path algorithms, comprised of the FIB4-score, VCTE and the ELF-test, for the detection of advanced stages of NAFLD-fibrosis is proposed: the Nijmegen-Leiden-AmsterdamNAFLD-NASH 2-tiered care path study: NLA2-study.

Objective of the study:

The aim of the study is to improve case finding of advanced cases of NAFLD (≥F3 fibrosis), whilst simultaneously reducing unnecessary referrals for mild cases (\<F3 fibrosis). Additionally, the aim is to increase awareness of NAFLD, and NAFLD-related complications, and to assess the cost-effectiveness of the different proposed care paths compared to current regular care.

Study design:

This is a care innovation study, with an estimated duration of three years. The intend is to commence the study at three academic medical centres namely in Nijmegen, Leiden and Amsterdam, with the intention to include other non-academic hospitals after the initial roll-out. The study has both a prospective and a retrospective part. The prospective part consists of participants who are deemed by their treating specialist physician to be at risk of severe NASH fibrosis. Participants will be invited to attend a study visit.

This study visit will consist of, among others: anthropometric measurements, blood pressure measurement, blood sampling and VCTE. The diagnostic testing for potentially underlying advanced (≥F3) liver fibrosis consists of the FIB4-score, VCTE and the ELF-test. A blood sample will be stored for additional biomarker testing. Based on predefined cut-offs for the FIB4-score and liver stiffness measurement (LSM) (measured using VCTE), participants will be classified as being at low or high risk of advanced (≥F3)fibrosis (see figure 1). The ELF-test will be analysed in bulk and will thus not be used for risk assessment. Participants classified at low risk will remain under the care of their treating specialist. Participants classified at high risk of advanced (≥F3) fibrosis will be referred to a hepatologist. Read-outs of the electronic health records (EHR) of all participants will be performed at 24 months after inclusion in the study, an dat six months for those classified at high risk. Read-outs will be performed to assess the correctness of the risk assessment and subsequent referral to the hepatologist.

The three different sequential, two-tiered care path algorithms will be evaluated upon completion of the study. The diagnostic accuracy, defined as sensitivity, specificity, predictive values and AUROCs, of the three different care path algorithms will be calculated. The diagnostic performance will be expressed as the percentage of correct referrals and the percentage of unnecessary referrals of the different care path algorithms and the individual non-invasive tests, compared to regular care.

Study population:

The study population consists of adults (≥ 18 years old) who are suspected by their treating specialist to suffer from a severe stage of NAFLD-fibrosis. Exclusion criteria are, most notably, a previous diagnosis of advanced (≥F3) fibrosis, any other known chronic liver disease, use of drugs that may cause drug-induced steatosis, and present excessive alcohol use. The aim is to include 200 patients in analyses in total, of which 100 will be referred using the NLA2 study and 100 through regular care. The latter group will form the prospective comparator arm. This necessitates a 50% adherence rate of participating hospitals.

Conditions

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Non-Alcoholic Fatty Liver Disease

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Prospective care path arm

Participants who enter the care path will make up the prospective care path arm.

In patients entering the care path three diagnostic tests for liver fibrosis will be performed. FIB4-score, Vibration controlled transient elastography and Enhanced Liver Fibrosis test

FIB4-score

Intervention Type DIAGNOSTIC_TEST

A score which estimates the risk for advanced liver fibrosis, based on: age, ALT, AST and thrombocytes

Vibration controlled transient elastography

Intervention Type DIAGNOSTIC_TEST

VCTE measures the speed of a mechanically generated shear wave across the liver to derive a liver stiffness measurement (LSM), a marker of hepatic fibrosis

Enhanced Liver Fibrosis test

Intervention Type DIAGNOSTIC_TEST

The ELF-test is a non-invasive blood test that measures three direct markers of liver fibrosis: hyaluronic acid (HA), procollagen III amino-terminal peptide (PIIINP), and tissue inhibitor of matrix metalloproteinase 1 (TIMP-1).

Prospective arm of 'regular care'

Patients who are referred to the hepatologist in participating centers during the study period without using the care path (e.g. because of altered liver function tests for instance), will be the prospective 'regular care' arm

No interventions assigned to this group

Retrospective arm of 'regular care'

The investigators will do an data extraction of the electronic health records of patients referred to the hepatologist in the five years prior to the study. They will make up the retrospective comparative arm of regular care

No interventions assigned to this group

Interventions

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FIB4-score

A score which estimates the risk for advanced liver fibrosis, based on: age, ALT, AST and thrombocytes

Intervention Type DIAGNOSTIC_TEST

Vibration controlled transient elastography

VCTE measures the speed of a mechanically generated shear wave across the liver to derive a liver stiffness measurement (LSM), a marker of hepatic fibrosis

Intervention Type DIAGNOSTIC_TEST

Enhanced Liver Fibrosis test

The ELF-test is a non-invasive blood test that measures three direct markers of liver fibrosis: hyaluronic acid (HA), procollagen III amino-terminal peptide (PIIINP), and tissue inhibitor of matrix metalloproteinase 1 (TIMP-1).

Intervention Type DIAGNOSTIC_TEST

Other Intervention Names

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VCTE ELF-test

Eligibility Criteria

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Inclusion Criteria

* Age ≥ 18 years;
* Suspected by treating physician to suffer from a severe stage of NAFLD-fibrosis.

Exclusion Criteria

* Previous diagnosis of advanced (≥F3) liver fibrosis;
* Any other known chronic liver disease (alcoholic steatohepatitis, hepatitis B, hepatitis C, autoimmune hepatitis, hemochromatosis, Wilsons disease, alpha-1-antitrypsin deficiency);
* Drugs that may cause drug-induced hepatic steatosis, (table provided elsewhere)
* Present excessive alcohol use, defined as \> 2 units/day for women and \> 3 units/day for men;
* A psychiatric, addictive or any other disorder that compromises the subject's ability to understand the study content and to give written informed consent for the participation in the study.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Maag Lever Darm Stichting

OTHER

Sponsor Role collaborator

Radboud University Medical Center

OTHER

Sponsor Role collaborator

Leiden University Medical Center

OTHER

Sponsor Role collaborator

Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)

OTHER

Sponsor Role lead

Responsible Party

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Onno Holleboom, MD, PhD

Vascular internist and endocrinologist, Assistant professor, Principal investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Onno Holleboom, MD PhD

Role: PRINCIPAL_INVESTIGATOR

Amsterdam UMC, location AMC

Locations

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Radboudumc

Nijmegen, Gelderland, Netherlands

Site Status

Amsterdam UMC, location AMC

Amsterdam, North Holland, Netherlands

Site Status

Leiden universitair medisch centrum

Leiden, South Holland, Netherlands

Site Status

Countries

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Netherlands

References

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Reference Type BACKGROUND
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Other Identifiers

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NL81357.018.22

Identifier Type: -

Identifier Source: org_study_id

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