Prospective comparison of transient elastography, Fibrotest, APRI, and liver biopsy for the assessment of fibrosis in chronic hepatitis C

Background & Aims: Transient elastography (FibroScan; Echosens, Paris, France) is a novel, noninvasive, and rapid bedside method to assess liver fibrosis by measuring liver stiffness. We prospectively assessed the performance of FibroScan in patients with chronic hepatitis C, in comparison with and combined with currently available biochemical markers (Fibrotest; Biopredictive; and the aspartate transaminase to platelets ratio index [APRI]); a liver biopsy examination performed the same day served as the reference. Methods: We studied 183 consecutive patients with chronic hepatitis C (METAVIR fibrosis stage F1, n = 47; F2, n = 53; F3, n = 37; F4, n = 46). Results: FibroScan values ranged from 2.4 to 75.4 kilopascals (median, 7.4 kilopascals). Cut-off values were 7.1 kPa for F ≥ 2, 9.5 kPa for F ≥ 3, and 12.5 kPa for F = 4. The areas under the receiver operating characteristic (ROC) curve of FibroScan, FibroTest, and APRI values were of the same order (.83, .85, and .78, respectively, for F ≥ 2; .90, .90, and .84, respectively, for F ≥ 3; and .95, .87, and .83, respectively, for F = 4). The best performance was obtained by combining the FibroScan and FibroTest, with areas under the ROC curve of .88 for F ≥ 2, .95 for F ≥ 3, and .95 for F = 4. When the FibroScan and FibroTest results agreed, liver biopsy examination confirmed them in 84% of cases for F ≥ 2, in 95% for F ≥ 3, and in 94% for F = 4. Conclusions: FibroScan is a simple and effective method for assessing liver fibrosis, with similar performance to FibroTest and APRI. The combined use of FibroScan and FibroTest to evaluate liver fibrosis could avoid a biopsy procedure in most patients with chronic hepatitis C.

Abbreviations used in this paper:  AUROC, area under the receiver operating characteristic , CHC, chronic hepatitis C , CI, confidence interval , FS, FibroScan , FT, FibroTest , kPa, kilopascal , LB, liver biopsy , ROC, receiver operating characteristic