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Diagnostic efficacy of shear wave elastography in evaluating chronic hepatitis B liver fibrosis and related influencing factors
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摘要:
目的探讨剪切波弹性成像（SWE）评估慢性乙型肝炎（CHB）肝纤维化的诊断效能及影响因素。方法收集2016年1月-2017年9月于中国医科大学附属盛京医院就诊的CHB患者147例,所有患者均行剪切波弹性成像（SWE）检查,SWE检查之后1周内均进行肝穿刺活组织检查。同时收集患者的一般资料及血清学检测结果。不服从正态分布的计量资料组间比较采用MannWhitney U检验;计数资料组间比较采用χ2检验。绘制受试者工作特征曲线（ROC曲线）评估诊断效能,logistic回归模型分析影响SWE诊断肝纤维化分期准确度的因素。结果以肝组织学诊断肝纤维化分期为标准,SWE诊断肝纤维化≥F1期、≥F2期、≥F3期和≥F4期的ROC曲线下面积分别为0. 824、0. 880、0. 914和0. 986,最佳诊断界值分别为6. 1 k Pa、7. 0 k Pa、8. 1 kPa、10. 0 k Pa,敏感度分别为91. 0%、91. 7%、87. 0%、88. 9%,特异度分别为66. 0%、82. 8%、66. 0%、94. 9%,阳性预测值分别为85. 0%、78. 6%、48....
Abstract:Objective To investigate the diagnostic efficiency of shear wave elastography ( SWE) in evaluating chronic hepatitis B ( CHB) liver fibrosis and related influencing factors. Methods A total of 147 CHB patients who visited Shengjing Hospital of China Medical University from January 2016 to September 2017 were enrolled. SWE was performed for all patients, and liver biopsy was performed within one week after SWE. General information and serological test results of the patients were collected. The Mann-Whitney U test was used for comparison of non-normally distributed continuous data; the chi-square test was used for comparison of categorical data between groups.The receiver operating characteristic ( ROC) curve was plotted to evaluate diagnostic efficiency, and the logistic regression model was used to determine the factors associated with the accuracy of SWE in assessing liver fibrosis stage. Results With liver fibrosis stage determined by liver histology as the standard, the areas under the ROC curve of SWE in the diagnosis of ≥F1, ≥F2, ≥F3, and ≥F4 liver fibrosis were0. 824, 0. 880, 0. 914, and 0. 986, respectively, with sensitivities of 91. 0%, 91. 7%, 87. 0%, and 88. 9%, respectively and specificities of 66. 0%, 82. 8%, 66. 0%, and 94. 9%, respectively, at the optimal cut-off values of 6. 1 kPa, 7. 0 k Pa, 8. 1 kPa, and 10. 0 k Pa, respectively. The positive predictive values were 85. 0%, 78. 6%, 48. 3%, and 53. 3%, respectively, and the negative predictive values were 77. 5%, 93. 5%, 97. 2%, and 99. 2%, respectively. According to the results of liver biopsy, of all 147 patients, 94 had an accurate diagnosis based on SWE, while 53 had an inaccurate diagnosis; there were significant differences between these two groups in alanine aminotransferase, aspartate aminotransferase, and liver inflammation grade ( Z =-4. 211、-4. 649、-3. 513, all P < 0. 01) . Liver inflammation grade ( odds ratio [OR]= 0. 552, 95% confidence interval [CI]: 0. 317-0. 963, P = 0. 028) was an independent influencing factor for the diagnostic accuracy of SWE, and it had a significant effect on SWE in diagnosing liver fibrosis in the case of stage F0 liver fibrosis ( OR= 1. 809, 95% CI: 2. 305-51. 195) and stage F2 liver fibrosis ( OR = 1. 345, 95% CI: 1. 037-13. 647) . Conclusion Liver stiffness measured by SWE has good diagnostic efficacy in assessing liver fibrosis stage, and the accuracy of liver fibrosis stage assessment is affected by liver inflammation stage.
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Key words:
- hepatitis B, chronic /
- liver cirrhosis /
- elasticity imaging techniques /
- diagnosis /
- risk factors
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