AKA、CCP、RA33、RF、ESR联合检测在类风湿性关节炎中的应用

目的探讨联合检测血清中抗角蛋白抗体(抗AKA)、抗环瓜氨酸抗体(抗CCP)、抗RA33抗体、类风湿因子(RF)及红细胞沉降率(ESR)在诊断类风湿关节炎(RA)中的应用价值。方法收集该院2014年6月至2015年5月,经确诊的RA患者100例,疑似RA病例60例,对照组经确诊为非RA的其他自身免疫性疾病患者120例,分别用间接免疫荧光法(IFA)检测每组病例中的抗AKA抗体,用ELISA法检测抗CCP抗体和抗RA33抗体,用速率散射比浊法检测RF,用魏氏法检测ESR,并对各个诊断指标的诊断性能进行评价。结果抗AKA抗体、抗CCP抗体、抗RA33抗体、RF及ESR 5种检测指标在RA组中的检出率依次为64.0%、75.0%、44.0%、84.0%和51.0%,5项并联后的检出率(灵敏度)为97.0%,串联后的检测特异度为89.2%;在RA疑似组中5种检测指标的检出率依次为16.7%、31.7%、13.3%、20.0%、15.0%;在对照组中5种检测指标的检出率依次为0.8%、2.5%、1.7%、0.8%和5.8%,5种指标在RA组中的检出率显著高于疑似RA组,差异有统计学意义(P0.001),疑似RA组和对照组相比5种指标的检出率差异有统计学意义(P0.001),5项并联检测的灵敏度为97.0%,显著高于单项检测灵敏度(P0.05),5项串联检测的特异度最高达到100.0%,也显著高于单项检测特异度(P0.05),并联检测的漏诊率最低,阴性预测值最高,串联检测的误诊率最低,阳性预测值最高,并联检测的约登指数最大。结论抗CCP抗体和RF单独检测具有较好的灵敏度和特异度,而5种指标联合检测具有更高的灵敏度和特异度,可以更好地降低漏诊率和误诊率,大大地提高诊断效率,从而对RA的早期诊断具有重要的临床意义。

Application of combined detection of AKA antibody,anti-CCP antibody,anti-RA33antibody,RF and ESR in rheumatoid arthritis

Objective To investigate the application value of combined detection of antikeratin (AKA) antibody,anti-cyclic citrullinated peptide(anti-CCP) antibody,anti-RA33 antibody,RF and ESR in the diagnosis of rheumatoid arthritis(RA).Methods One hundred cases of RA and 60 cases of suspected RA in our hospital from June 2014 to May 2015 were collected.One hundred and twenty cases of non-RA other autoimmune diseases served as the control group.The indirect immunofluorescence assay (IFA) was used to detect anti-KA antibody,anti-CCP antibody and anti-RA33 antibody were detected by using ELISA.The rate scatter turbid assay was used to detect RF.The Westergren method was used to detect ESR.The diagnostic performance of each diagnostic indicator was evaluated.Results The detection rates of anti-KA antibody,anti-CCP antibody,anti-RA33 antibody,RF and ESR in the RA group were in turn 64%,75%,44%,84% and 51% respectively,the detection rate(sensitivity) of 5-indicator parallel detection were 97%, the specificity of 5-indicator series detection was 89.2%;in the suspected RA group,the detection rates of 5-indicator were in turn 16.7%, 31.7%,13.3%,20%,15% respectively,which in the control group were in turn 0.8%,2.5%,1.7%,0.8% and 5.8% respectively.The detection rates of 5-indicator in the RA group was significantly higher than that in the suspected RA group,showing extremely significant difference (P<0.001),the detection rate of 5-indicator had extremely significant difference between the suspected RA group and control group (P<0.001),the sensitivity of five-indicator parallel detection was 97%,which was significantly higher than that of single indicator detection (P<0.05),the detection specificity of 5-indicator series detection was up to 100%,which was also significantly higher than that of single indicator detection (P<0.05),the missed diagnosis rate of parallel detection was minimal,while the negative predictive value was highest,the misdiagnosis rate of series detection was lowest,the positive predictive value was highest,the Youden index of parallel detection was largest.Conclusion The single detection of anti-CCP antibody and RF have good sensitivity and specificity, but 5-indicator combined detection has higher sensitivity and specificity,which can better reduce the missed diagnosis rate and misdiagnosis rate,can greatly improve the efficiency of diagnosis,and has an important clinical significance for the early diagnosis of RA.