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Application value of liver and spleen stiffness measured by real-time shear wave elastography combined with hepatic steatosis index in diagnosis of hepatic steatosis |
GUO Yun-lei, RUAN Li-tao, DANG Ying, BAI Xiao-fang, CHEN Hong, WANG Xiang, LI Ning, LI Yue-jiao |
The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China |
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Abstract Objective: To study the application value of liver and spleen stiffness measured by real-time shear wave elastography(SWE) combined with hepatic steatosis index(HSI) to diagnosis the severity of hepatic steatosis in non-alcoholic fatty liver disease(NAFLD). Methods: Patients who met the inclusion criteria and treated at the First Affiliated Hospital of Xi’an Jiaotong University from January 2017 to June 2018 were included. Referring to the upper abdominal CT scan results, we divided the included patients into four groups as: control group and mild, moderate, severe fatty liver groups. Comparing liver stiffness(LS) and spleen stiffness(SS) measured by SWE and HSI between groups was performed. Calculate the ROC curves of single and joint indicators for diagnosis hepatic steatosis. Results: LS, SS and HSI were all significantly different among groups(P<0.05). After comparing between any two means, we found LS, SS and HSI have poor ability to identify adjacent levels of fatty liver. So we just calculated the ROC curves for diagnosing moderate to severe fatty liver. The area under the ROC curves(AUROC) were 0.895±0.030, 0.730±0.041 and 0.788±0.036(P<0.05) respectively. The critical values were 7.35 kPa, 23.65 kPa and 36.32 respectively. Finally, we calculated the joint indicators’ ROC curves. The AUROC of LS+HSI was 0.904±0.028(P<0.05), the sensitivity was 88.3% and the specificity was 87.0%. The AUROC of SS+HSI was 0.824±0.033(P<0.05), the sensitivity was 75.0% and the specificity was 77.2%. Conclusion: LS and SS measured by SWE combine with HSI can accurately detect moderate to severe NAFLD. LS+HSI had the highest diagnostic performance than others with a good clinical value.
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Received: 28 June 2018
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