Superior diagnostic efficacy and cost advantage of FibroTouch over CHI3L1 for liver fibrosis in Chinese patients with chronic liver disease

Background Non-invasive assessment of liver fibrosis is essential for managing chronic liver disease (CLD). Serum chitinase-3-like protein 1 (CHI3L1) has been recommended in recent guidelines, while FibroTouch is a domestically produced device for liver stiffness measurement (LSM). However, no study has directly compared their diagnostic performance in CLD patients. Methods This retrospective study included 235 patients with CLD who underwent liver biopsy, FibroTouch examination, and laboratory testing (including CHI3L1 and routine blood parameters) at Hangzhou Xixi Hospital between October 2019 and December 2024. Liver fibrosis was staged according to the Scheuer scoring system (S0–S4). The diagnostic performance of LSM, CHI3L1, and six serological models (aspartate aminotransferase-to-platelet ratio index [APRI], fibrosis-4 index [FIB-4], S-Index, Forns index, platelet ratio-to-RDW [PRP], and FIB-5) were evaluated using receiver operating characteristic (ROC) curve analysis, with liver biopsy as the reference standard. Results Among the 235 patients, 125 (53.2%) had significant fibrosis (≥S2). LSM demonstrated excellent diagnostic accuracy, with area under the curve (AUROC) values of 0.86 for detecting significant fibrosis (≥S2), 0.91 for advanced fibrosis (≥S3), and 0.93 for cirrhosis (S4). CHI3L1 showed moderate diagnostic performance, with corresponding AUROC values of 0.72, 0.79, and 0.81. LSM exhibited the strongest correlation with histological staging (r = 0.70, p < 0.0001). Among serological models, APRI and FIB‑4 showed relatively better performance, while FIB‑5 performed poorly. Conclusions In this biopsy-proven CLD cohort, LSM demonstrated superior diagnostic performance for liver fibrosis assessment compared to CHI3L1 and six serological models, with the strongest correlation with histological staging. Given its better diagnostic efficacy and lower cost, LSM offers a practical advantage as a routine monitoring tool in clinical practice, particularly in resource-constrained settings.