ABSTRACT
Objective To evaluate the consistency of the test results detected by multiple automated hematology analyzers .Meth-ods The EP9-A2 guideline of NCCLS ,Passing-Bablok regression analysis and t test were adopted to compare the detection results of hemoglobin(HGB) ,hematocrit (HCT) ,red blood cell count(RBC) ,white blood cell count (WBC) and platelet(PLT) in 115 samples from patients by 5 automated haematology analyzers of the Sysmex XE-2100 ,the Sysmex XT-1800i ,the Sysmex XS-1000i , the Mindray BC-5300 and ABX pentra80 .The Sysmex XE-2100 was used as the reference instrument .Results In the detection of all the compared items including HGB ,HCT ,RBC ,WBC and PLT ,these automated hematology analyzers exhibited very good cor-relation(r>0 .97) ,whereas the individual parameters in 3 automated hematology analyzers appeared the proportional systematic differences and /or constant systematic differences ,including HCT in the sysmex XT-1800i ,HCT and RBC in the sysmex XS-1000i and RBC in the ABX pentra 80 .Conclusion The Passing-Bablok regression analysis combined with t test may identify the system-atic differences of the comparative results of 2 automated haematology analyzers ,the consistency of the comparative results of the automated hematology analyzers can not be evaluated by the simple correlation coefficient .