Diagnostic accuracy, reproducibility and robustness of fibrosis blood tests in chronic hepatitis C: a meta-analysis with individual data.
OBJECTIVE
To evaluate the diagnostic accuracy of liver fibrosis tests and its influencing factors in a meta-analysis with individual data.


METHODS
Four independent centers provided four blood tests and Metavir staging from 825 patients with chronic hepatitis C.


RESULTS
FibroMeter AUROC (0.840) for significant fibrosis was superior to those of Fibrotest (0.803, p=0.049), APRI (0.789, p=0.001) and Hepascore (0.781, p<0.001). The misclassification rate was lower for FibroMeter (23%) than for Fibrotest and Hepascore (both 28%, p<0.001). The variation in the diagnostic cut-offs of tests among centers, reflecting the overall reproducibility, was: FibroMeter: 4.2%, APRI: 24.0%, Fibrotest: 24.2%, Hepascore: 35.0%. Accordingly, the proportion of patients diagnosed with significant fibrosis changed: FibroMeter: 0.8%, Hepascore: 2.4% (p=0.02 vs FibroMeter), Fibrotest: 5.8% (p<10(-3)), APRI: 18.2% (p<10(-3)).


CONCLUSIONS
This study on clinical applicability shows significant differences in diagnostic accuracy, inter-center reproducibility, and robustness of biomarkers to changes in population characteristics between blood tests.
Leroy
Vincent
V
Clinique d'Hépato-Gastroentérologie, Pôle Digestif-DUNE, CHU, Grenoble, France. VLeroy@chu-grenoble.fr
Halfon
Philippe
P
Bacq
Yannick
Y
Boursier
Jérôme
J
Rousselet
Marie Christine
MC
Bourlière
Marc
M
de Muret
Anne
A
Sturm
Nathalie
N
Hunault
Gilles
G
Penaranda
Guillaume
G
Bréchot
Marie-Claude
MC
Trocme
Candice
C
Calès
Paul
P
D005260:Female; D005355:Fibrosis; D006403:Hematologic Tests / Q000592:standards*; D019698:Hepatitis C, Chronic / Q000097:blood / Q000175:diagnosis* / Q000473:pathology*; D006801:Humans; D008297:Male; D012372:ROC Curve; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity