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Fig. 1. Elecsys hepatitis B surface antigen (HBsAg) confirmatory test. (A) Box plot of HBsAg cut-off index (COI) based on HBsAg confirmatory test result. The HBsAg COI of HBsAg confirmatory test positive group and negative group showed significant difference. (B) Receiver operating characteristic (ROC) curve analysis of HBsAg based on HBsAg confirmatory test showed area under curve 0.876.
Lab Med Qual Assur 2021;43:80~86
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