Comparison Of Double Antigen Sandwich ELISA And Indirect ELISA Assay For The Diagnosis Of Hepatitis C Virus Antibody

Objective: The aim of this study is to compare double antigen sandwich enzyme-linked immunosorbent assay(ELISA)and indirect ELISA in the diagnosis of hepatitis C virus(HCV)infection.Methods: A total of 176 samples from the Tumor Hospital Affiliated to Xin Jiang Medical University were utilized to comparison.All serum samples were tested using double antigen sandwich ELISA and indirect ELISA.Cohen's kappa statistics were used to assess the agreement between the two assays,multivariate analysis was used to evaluate risk factors for the discordance between the double antigen ELISA and indirect ELISA.Results: The positivities of indirect ELISA(Beijing Wantai),double antigen sandwich ELISA(Beijing Wantai)and indirect ELISA(Beijing Jinhao)were 74.43%,68.75% and 73.30%,respectively.The agreement between the indirect ELISA(Beijing Wantai)and double antigen sandwich ELISA(Beijing Wantai)was high(?=0.829;P<0.001),the agreement betweeen the double antigen sandwich ELISA(Beijing Wantai)and indirect ELISA(Beijing Jinhao)was high(?=0.847;P<0.001).Variables associated with discordant results between the double antigen sandwich ELISA and indirect ELISA in multivariate analysis were as follows: female(OR:1.462;P<0.05),age(<35 years old;OR:3.667;P<0.05),cancer(suffer from malignant tumor;OR:3.621;P<0.05).Conclusion: In detection of HCV,high agreement was found between the double antigen sandwich ELISA and indirect ELISA.Female,younger age and suffer from malignant tumor were significant risk factors for the discordance.Based on double antigen sandwich ELISA has distinct methodological advantages over indirect ELISA.It is recommended for the diagnosis of HCV infection.