Abstract
BACKGROUND: Histologically assessed liver fibrosis stage has prognostic significance in patients with non-alcoholic fatty liver disease (NAFLD) and is accepted as a surrogate endpoint in clinical trials for non-cirrhotic NAFLD. Our aim was to compare the prognostic performance of non-invasive tests with liver histology in patients with NAFLD.
METHODS: This was an individual participant data meta-analysis of the prognostic performance of histologically assessed fibrosis stage (F0-4), liver stiffness measured by vibration-controlled transient elastography (LSM-VCTE), fibrosis-4 index (FIB-4), and NAFLD fibrosis score (NFS) in patients with NAFLD. The literature was searched for a previously published systematic review on the diagnostic accuracy of imaging and simple non-invasive tests and updated to Jan 12, 2022 for this study. Studies were identified through PubMed/MEDLINE, EMBASE, and CENTRAL, and authors were contacted for individual participant data, including outcome data, with a minimum of 12 months of follow-up. The primary outcome was a composite endpoint of all-cause mortality, hepatocellular carcinoma, liver transplantation, or cirrhosis complications (ie, ascites, variceal bleeding, hepatic encephalopathy, or progression to a MELD score ≥15). We calculated aggregated survival curves for trichotomised groups and compared them using stratified log-rank tests (histology: F0-2 vs F3 vs F4; LSM: <10 vs 10 to <20 vs ≥20 kPa; FIB-4: <1·3 vs 1·3 to ≤2·67 vs >2·67; NFS: <-1·455 vs -1·455 to ≤0·676 vs >0·676), calculated areas under the time-dependent receiver operating characteristic curves (tAUC), and performed Cox proportional-hazards regression to adjust for confounding. This study was registered with PROSPERO, CRD42022312226.
FINDINGS: Of 65 eligible studies, we included data on 2518 patients with biopsy-proven NAFLD from 25 studies (1126 [44·7%] were female, median age was 54 years [IQR 44-63), and 1161 [46·1%] had type 2 diabetes). After a median follow-up of 57 months [IQR 33-91], the composite endpoint was observed in 145 (5·8%) patients. Stratified log-rank tests showed significant differences between the trichotomised patient groups (p<0·0001 for all comparisons). The tAUC at 5 years were 0·72 (95% CI 0·62-0·81) for histology, 0·76 (0·70-0·83) for LSM-VCTE, 0·74 (0·64-0·82) for FIB-4, and 0·70 (0·63-0·80) for NFS. All index tests were significant predictors of the primary outcome after adjustment for confounders in the Cox regression.
INTERPRETATION: Simple non-invasive tests performed as well as histologically assessed fibrosis in predicting clinical outcomes in patients with NAFLD and could be considered as alternatives to liver biopsy in some cases.
FUNDING: Innovative Medicines Initiative 2.
Original language | English |
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Pages (from-to) | 704-713 |
Number of pages | 10 |
Journal | The Lancet Gastroenterology & Hepatology |
Volume | 8 |
Issue number | 8 |
Early online date | 5 Jun 2023 |
DOIs | |
Publication status | Published - Aug 2023 |
Bibliographical note
Acknowledgments:This individual participant data meta-analysis has been conducted as part of the imaging study in the Liver Investigation: Testing Marker Utility in Steatohepatitis (LITMUS) study. The LITMUS study is a large multicentre study aiming to evaluate biomarkers on non-alcoholic fatty liver disease. The LITMUS study is funded by the Innovative Medicines Initiative 2 (IMI2) Joint Undertaking under Grant Agreement 777377. This Joint Undertaking receives support from the EU's Horizon 2020 research and innovation programme and EFPIA. This communication reflects the view of the LITMUS consortium and neither IMI nor the EU and EFPIA are liable for any use that may be made of the information contained herein. GS is supported by a Senior Salary Award from Fonds de Recherche du Quebec–Sante (#296306). FEM was partially funded by a Sir Henry Dale Fellowships awarded jointly by the Wellcome Trust and the Royal Society [221805/Z/20/Z]. DHL received a grant from KHIDI (HI14C1135), funded by the Ministry of Health & Welfare, Korea. QMA is an NIHR Senior Investigator and is supported by the Newcastle NIHR Biomedical Research Centre.
Copyright:
© 2023 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license. Published by Elsevier Ltd.. All rights reserved.
Keywords
- Humans
- Female
- Middle Aged
- Male
- Non-alcoholic Fatty Liver Disease/complications
- Diabetes Mellitus, Type 2/complications
- Esophageal and Gastric Varices
- Gastrointestinal Hemorrhage/complications
- Liver Cirrhosis/etiology
- Fibrosis