Accuracy of type IV collagen 7S versus Enhanced Liver Fibrosis score for diagnosing fibrosis in patients with metabolic dysfunction-associated steatotic liver disease

Abstract

Background: Various noninvasive tests can be used to identify high-risk groups of patients with metabolic dysfunction-associated steatotic liver disease/steatohepatitis (MASLD). In this study, we compared the diagnostic performance of serum type 4 collagen 7S (COL4-7S) and the Enhanced Liver Fibrosis (ELF) score for detecting fibrosis in patients with MASLD.

Methods: Among 1368 patients with MASLD who underwent liver biopsy, 794 with values for both serum COL4-7S and the ELF score were enrolled in this multicenter study. The diagnostic performance of COL4-7S and ELF for detecting fibrosis stage ≥2, fibrosis stage ≥3, and at-risk metabolic dysfunction-associated steatohepatitis were evaluated using ROC curve, continuous net reclassification improvement, and integrated discrimination improvement analyses.

Results: Both COL4-7S and ELF scores increased significantly with increasing fibrosis. The AUROC for each outcome was higher for COL4-7S than ELF, but not significantly. The diagnostic performance for detecting fibrosis stage ≥2 was significantly better for COL4-7S than for the ELF score (s net reclassification improvement=16.7%, p=0.018; integrated discrimination improvement=3.9%, p<0.01). In patients without diabetes, the diagnostic performance for each outcome did not differ significantly between COL4-7S and ELF score, but in patients with diabetes, the diagnostic performance for fibrosis stage ≥2 was higher for COL4-7S than for the ELF score (AUROC=0.817 vs. 0.773, p=0.04; s net reclassification improvement=32.7%, p<0.01; integrated discrimination improvement=5.6%, p<0.01).

Conclusions: The diagnostic performance of serum COL4-7S (a single marker) for identifying more advanced disease in patients with MASLD was at least equivalent to that of the ELF score (a combined marker).