Milman NILS, Byg KELD-ERIK, Juul-Jørgensen BIRGIT, Weis Bentzon MICHAEL
Department of Medicine, Nae stved Hospital, Nae stved.
Hematology. 1999;4(2):179-184.
The serum ferritin assays, Ferritin RIA Amersham(TM) and Abbott AxSYM(TM) Ferritin were compared in order to translate values from one assay to the other. Serum ferritin was analysed with both assays in 102 samples. Logarithmic transformation of the results was performed in order to stabilize the variance. The relationship between the untransformed values was most exactly expressed by a proportionality: AxSYM Ferritin = 0.873 * RIA Ferritin. Due to this proportionality, the numerical difference between the assays increases with the ferritin concentration, although the percentage difference between the assays remains constant.
为了将一种检测方法的结果换算为另一种检测方法的结果，对血清铁蛋白检测方法即Amersham公司的铁蛋白放射免疫分析（RIA）法和雅培公司的AxSYM铁蛋白检测法进行了比较。对102份样本同时采用这两种检测方法分析血清铁蛋白。为使方差稳定，对结果进行了对数转换。未转换值之间的关系最准确地表现为一种比例关系：AxSYM铁蛋白 = 0.873×RIA铁蛋白。由于这种比例关系，尽管两种检测方法之间的百分比差异保持恒定，但两种检测方法之间的数值差异会随着铁蛋白浓度的增加而增大。
