Comparison of decline rate of HBsAg S/CO values from RF between group “one-step ELISA” and “two-step ELISA”.

RF levels range from 327 to 8090 IU/ml;“S1” and “S2” mean median HBsAg S/CO values in serum models provided by one-step ELISA and two-step ELISA; “O1” and “O2” mean median original-values provided by one-step ELISA and two-step ELISA. “P1” and “P2” were calculated by Signed Ranks Test and used to identify whether there is significant difference between “S1” and “O1”, and between “S2” and “O2”, respectively.“D1” and “D2” was calculated using formula D=(X1- X2)/X1, X1 and X2 represent original and measurable values of HBsAg S/CO in serum models P value was calculated by Paired Samples T Test or Signed Ranks Test(in group III) and used to identify whether there is significant difference between “D1” and “D2”.