PROPRIETARY INFORMATIONCONFIDENTIAL MATERIALNot for Customer DistributionAEROSET® System Troubleshooting Guide 10194816-107—November 2004Assay-specific InformationAcid PhosphataseMethod ComparisonThe Abbott Clinical Chemistry Acid Phosphatase (ACP) assaycompares well to some other assays and not as well to others.Review of CAP proficiency testing survey results indicates thedegree of comparability that can be expected. For two surveyspecimens, the mean values are listed in the following table.Array and AEROSET values for ACP agree with each other, asdo the Vitros and Paramax, but the Array/AEROSET do notagree with Vitros/Paramax. ACP values for three other CAPspecimens tested by Paramax and AEROSET demonstratesimilar disparity (1.93, 10.85, and 7.73 U/L by Paramax; 5.67,40.39, 29.19 U/L by AEROSET).Method comparison data for AEROSET and Paramax yieldedthe following least squares equation:AEROSET = 3.61 (Paramax) - 2.96, r = 0.992, N = 78When the same data were analyzed using Passing-Bablok, theequation was:AEROSET = 2.86 (Paramax) - 1.59, r = 0.992, N = 78Instrument Specimen 1 (U/L) Specimen 2 (U/L)Array 1.55 19.78AEROSET 1.66 21.70Paramax 0.44 5.57Vitros 0.65 5.55
