检验医学 ›› 2014, Vol. 29 ›› Issue (8): 826-830.DOI: 10.3969/j.issn.1673-8640.2014.08.010

• 临床应用研究·论著 • 上一篇    下一篇

ROC曲线对ELISA检测丙型肝炎抗体阳性判断值的确定和分析

唐婧, 包建玲, 孟存仁, 张朝霞   

  1. 新疆医科大学第一附属医院医学检验中心,新疆 乌鲁木齐 830054
  • 收稿日期:2013-11-29 出版日期:2014-08-30 发布日期:2014-09-05
  • 通讯作者: 通讯作者:张朝霞,联系电话:0991-4366075。
  • 作者简介:唐婧,女,1988年生,学士,主要从事丙型肝炎的免疫学新进展研究。
  • 基金资助:
    卫生部医药卫生科技发展研究中心专项课题(28-1-13)

Confirmation and analysis of the cut-off value in hepatitis C antibody determined by ELISA with receiver operating characteristic curve

TANG Jing, BAO Jianling, MENG Cunren, ZHANG Zhaoxia   

  1. Center for Clinical Laboratory, the First Affiliated Hospital of Xinjiang Medical University, Xinjiang Urumqi 830054, China
  • Received:2013-11-29 Online:2014-08-30 Published:2014-09-05

摘要: 目的 采用受试者工作特征(ROC)曲线确定和分析2种不同酶免分析系统酶联免疫吸附试验(ELISA)检测丙型肝炎抗体(抗HCV)的阳性判断值(Cut-off)。方法 收集202份血清,用重组免疫印迹法(RIBA)确认抗HCV,同时采用国产addcare ELISA 1100全自动酶免分析系统(简称addcare ELISA 1100)和进口TECAN+FAME组合的酶免分析系统(简称TECAN+FAME酶免系统)检测抗HCV,对吸光度(A)值绘制ROC曲线,得出ELISA检测抗HCV在本实验室的最佳Cut-off值。结果 以RIBA结果为金标准,ROC曲线分析结果显示,addcare ELISA 1100检测抗HCV的最佳Cut-off值为0.448,敏感性为99.3%,特异性为96.7%,约登指数为0.960,ROC曲线下面积为0.998,TECAN+FAME酶免系统检测抗HCV的最佳Cut-off值为0.406,敏感性为99.3%,特异性为96.7%,约登指数为0.960,ROC曲线下面积为0.998。结论 采用ROC曲线分析得到两种不同酶免分析系统ELISA检测抗HCV的Cut-off值分别为0.448和0.406,检测抗HCV的“灰区”分别设定为0.140~0.448和0.140~0.406,均可优化检测性能。

关键词: 丙型肝炎抗体, 酶联免疫吸附试验, 重组免疫印迹法, cut-off值, 受试者工作特征曲线

Abstract: Objective To confirm and analyze the cut-off value in anti-hepatitis C virus (HCV) antibody determined by 2 different kinds of enzyme-linked immunosorbent assay (ELISA) analysis systems with receiver operating characteristic (ROC) curve. Methods A total of 202 sera confirmed by recombinant immunoblot assay (RIBA) were determined by domestic addcare ELISA 1100 automatic analysis system and imported combined TECAN with FAME ELISA analysis system for anti-HCV antibody. ROC curve was drawn with absorbance (A) by SPSS 17.0 software, and the optimal cut-off value was obtained. Results According to the results of ROC curve, RIBA as the golden standard, the optimal cut-off values were 0.448 in addcare ELISA 1100 automatic analysis system and 0.406 in TECAN+FAME combined ELISA analysis system. Their sensitivities, specificities, Youden indices and areas under ROC curve were 99.3%, 99.3%; 96.7%, 96.7%; 0.960, 0.960 and 0.998, 0.998. Conclusions The cut-off values are 0.448 and 0.406 in the 2 analysis systems with by ROC curve, and the ambiguous regions are 0.140-0.448 and 0.140-0.406.The 2 ELISA analysis systems can optimize the performance of detection.

Key words: Anti-hepatitis C virus antibody, Enzyme-linked immunosorbent assay, Recombinant immunoblot assay, Cut-off value, Receiver opearting characteristic curve

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