Comparison on three methods in the examination of urine sediment

Objective To compare the performances of UF-1000i urine sediment analyzer,dry chemistry method and manual microscopy in the determinations of red blood cell(RBC) and white blood cell(WBC).Methods 996 urine samples were collected.The RBC and WBC were determined by UF-1000i urine sediment analyzer,dry chemistry method and manual microscopy.The results were compared and analyzed statistically.Results With the positive cut-off value of 25 per μL for RBC and 30 per μL for WBC,the complete concordances were 78.4% for RBC and 67.2% for WBC.The concordances defined by the grade between the 2 analyzers were found to be 85.6% for RBC and 86.5% for WBC.The false positive rates of the UF-1000i were 4.62% for RBC and 1.81% for WBC.Conclusions These 3 urinalysis methods show good concordance with each other in urine sediment examination.The UF-1000i is more accuracy and anti-interferential than UF-100,but manual microscopy is still necessary.