title: The Diagnostic Accuracy and Clinical Utility of Three Noninvasive Models for Predicting Liver Fibrosis in Patients with HBV Infection.
abstract: OBJECTIVE
  To evaluate the diagnostic accuracy and clinical utility of the fibrosis index based on the four factors (FIB-4), aspartate aminotransferase -to-platelet ratio index (APRI), and aspartate aminotransferase-alanine aminotransferase ratio index (AAR) for predicting liver fibrosis in patients with HBV infection.
  
  
  METHODS
  From January 2006 to December 2010,a total of 1543 consecutive chronic hepatitis B(CHB) patients who underwent liver biopsies were enrolled. FIB-4,APRI, and AAR were calculated.The areas under the receiver-operating characteristic curves (AUROCs) were calculated to assess the diagnostic accuracy of these models.The AUROCs of these models were compared by DeLong's test.For further comparisons in different studies,the AUROCs were adjusted to conduct Adjusted AUROCs(ADjAUROCs) according to the prevalence of fibrosis stages using the difference between advanced and nonadvanced fibrosis (DANA).
  
  
  RESULTS
  For prediction of significant fibrosis,severe fibrosis,and cirrhosis,the AUROCs of FIB-4 were 0.646(ADjAUROC 0.717),0.670(ADjAUROC 0.741), and 0.715(ADjAUROC 0.786) respectively;whereas it were 0.656(ADjAUROC 0.727),0.653(ADjAUROC 0.724) and 0.639(ADjAUROC 0.710) for APRI, 0.498(ADjAUROC 0.569),0.548(ADjAUROC 0.619) and 0.573(ADjAUROC 0.644) for AAR. The further comparisons demonstrated that there were no significant differences of AUROCs between FIB-4 and APRI in predicting significant and severe fibrosis(P > 0.05),while FIB-4 was superior to APRI in predicting cirrhosis(P < 0.001). Further subgroup analysis demonstrated that the diagnostic accuracy of FIB-4 and APRI in patients with normal alanine aminotransferase(ALT) were higher than that in patients with elevated ALT.
  
  
  CONCLUSIONS
  The results demonstrated that FIB-4 and APRI are useful for diagnosis of fibrosis. FIB-4 and APRI have similar diagnostic accuracy in predicting significant and severe fibrosis,while FIB-4 is superior to APRI in predicting cirrhosis. The clinical utility of FIB-4 and APRI for fibrosis need further external validation in a large population before it was used for prediction of fibrosis in patients with HBV infection.
authors.affiliation: Department of Infectious Diseases, The Shunde First People's Hospital, Shunde, Guangdong, China.
authors.forename: Zhiqiao
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Infectious Diseases, The Shunde First People's Hospital, Shunde, Guangdong, China.
authors.forename: Gongsui
authors.initials: G
authors.lastname: Wang
authors.affiliation: Department of Pathology, The Shunde First People's Hospital, Shunde, Guangdong, China.
authors.forename: Kaifu
authors.initials: K
authors.lastname: Kang
authors.affiliation: Department of Pathology, The Shunde First People's Hospital, Shunde, Guangdong, China.
authors.forename: Guobiao
authors.initials: G
authors.lastname: Wu
authors.affiliation: Department of Infectious Diseases, The Shunde First People's Hospital, Shunde, Guangdong, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
mesh_terms: D000328:Adult; D000410:Alanine Transaminase / Q000097:blood; D005260:Female; D006509:Hepatitis B / Q000150:complications* / Q000503:physiopathology; D006801:Humans; D008103:Liver Cirrhosis / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D008111:Liver Function Tests; D008297:Male; D008954:Models, Biological
chemical_list: D000410:Alanine Transaminase