摘要目的 系统评价血清免疫球蛋白G4(IgG4)鉴别诊断自身免疫性胰腺炎(AIP)与胰腺癌的价值.方法 计算机检索2015年4月1日前在Medline、EMBASE、Science Direct、Springer link、CBM、万方、维普以及中国知网数据库公开发表的有关血清IgG4鉴别诊断AIP与胰腺癌价值的英文文献,按照严格的纳入、排除标准筛选文献并提取数据,采用QUADAS量表进行文献质量评估,Stata12.0软件评估文献发表偏倚,用Meta-Disc 1.4统计软件进行异质性分析和综合定量合成,计算汇总的灵敏度、特异度、阳性似然比、阴性似然比,并绘制汇总受试者工作特征(SROC)曲线评估诊断效能.结果 共纳入13篇英文文献1403例患者,其中AIP患者448例,胰腺癌患者955例.IgG,4鉴别诊断AIP及胰腺癌的汇总灵敏度为74％ (95％ CI 70％ ～ 78％),汇总特异度为93％ (95％ CI 91％～ 95％),阳性似然比为10.74(95％ CI7.16～ 16.11),阴性似然比为0.25(95％ CI0.17 ～0.35),SROC曲线下面积为0.9340.结论 血清IgG4鉴别诊断AlP与胰腺癌的诊断效能较高,误诊率低,可以作为早期诊断AIP的辅助指标之一.

abstractsObjective To evaluate the role of serum immunoglobulin G4 (IgG4) in differentiating autoimmune pancreatitis (AIP) from pancreatic cancer(PC).Methods The database,including Medline,EMBASE,Science Direct,Springer link,CBM,Wanfang,VIP and Cnki were searched by computer and the publication date was before April 1,2015.The studies on evaluating the accuracy of IgG4 in differentiating AIP from PC were screened and selected according to strict determined inclusion and exclusion criteria.Quality assessment was made by QUADAS scale.The publication bias were assessed by Stata12.0 software.The heterogeneity of included articles,calculate the pooled sensitivity,specificity,positive likelihood,negative likelihood were anylyzed by Meta-Disc1.4 software,respectively,and draw the summary ROC (SROC) curve.Results A total of 13 English articles were included and 1403 patients were involved.The pooled sensitivity was 74％ (95％ CI 70％ ～ 78％),the pooled specificity was 93％ (95％ CI 91％ ～ 95％),the positive likelihood ratio was 10.74 (95％ CI 7.16 ～ 16.11),the negative likelihood ratio was 0.25 (95％ CI 0.17 ～0.35) and the area under SROC curve was 0.9340.Conclusions IgG4 has high diagnostic efficacy but low misdiagnosis rate in differentiating AIP from PC,which can be used as one of early diagnostic markers for AIP.