Transient Versus Bidimensional Shear Wave Elastography in Serial Combination Strategy to Diagnose Advanced Fibrosis in NAFLD Patients

The investigators retrospectively selected all consecutive adult patients with suspicion of NAFLD who had undergone liver biopsy from November 2011 to July 2019 in 2 French academic centers, Angers and Bordeaux university hospitals. A total of 577 patients were included. Among them, 291 had been previously included in a prospective study comparing diagnostic performances of several non-invasive tests in NAFLD patients. Inclusion criteria were: Age≥18yo, 2D-SWE-SSI and VCTE performed within the two weeks prior to liver biopsy. Exclusion criteria were high alcohol consumption (i.e., >21 drinks, on average, per week in men and >14 drinks, on average, per week in women), associated causes of liver disease (alcoholic, viral, or other causes of liver injury), other aetiologies than NAFLD on pathological examination, and a liver biopsy length of less than 10 mm and/or fewer than 6 portal spaces and/or more than 2 fragments, except for in cases of cirrhosis.