Three-way comparison of different ESR measurement methods and analytical performance assessment of TEST1 automated ESR analyzer

Three-way comparison study yielded a strong correlation between methods. As part of the method validation before implementing a new analyzer, full validation of TEST1 showed that all validated parameters met the manufacturer's specifications. A negative bias was observed but remains within the acceptable criteria. Difference in values for samples with low hematocrit were noted, but these can be corrected by Fabry's formula applied to the values from WG method.