KHB, as a sFLC detection method based on polyclonal antibodies and immunoturbidimetric principles, has a good correlation between its detection results and freelite and N Latex. The absolute difference in sFLC results among the three assays increased with increasing sFLC concentration, and selecting the same cutoff value for iFLC/niFLC may lead to inconsistent clinical treatment decisions in some patients.
Cui et al. (Sat,) studied this question.