Comparison of three immunoassays for XXXX determination.

@entity141 @entity460 @entity1851
Three widely used immunoassays for @entity1851 ( @entity1851 ) determination (RID. RIEP and LN--Behring) were compared. According to the @entity1851 @entity460 dependent structural changes or ligand binding properties two buffer systems, @entity141 rich and @entity141 depleted, were used in all methods. In RID and RIEP mean values of studied samples were higher when @entity141 depleted buffer was used (r = 0.94 and r = 0.88, respectively). However, in LN mean values of studied samples were higher when @entity141 rich buffer was employed (r = 0.923). Comparison of RID and RIEP showed better correlation when @entity141 depleted buffer was used with r = 0.913 and regression equation y = 0.92 chi + 2.76. Comparison of RID with LN gave similar results as in the case of RIEP and LN. In both cases mean values of studied samples were much higher in LN. Best correlation between RID and LN was obtained when RID was run in @entity141 depleted buffer and LN performed in @entity141 rich buffer (r = 0.845, y = 1.25 chi + 18.4). When RIEP and LN were compared highest correlation was obtained when @entity141 rich buffer in both methods had been used (r = 0.84, y = 1.45 chi + 33.7). However, comparison of both methods run in @entity141 depleted buffer yielded better regression equation: y = 1.05 chi + 26.1 with r = 0.795.
