Comparison between Roche Integra 400 plus and Abbott Architect ci8200 in Alanine aminotransferase assay

BACKGROUND: The aim of this work is to present the results of a comparative study between the ALT assay on Integra 400 plus Roche Diagnostic versus Architect ci8200 of Abbott Diagnostic. METHODS: A total of 200 patients hospitalized in the various departments of the university hospital Mohammed VI of Oujda were prospectively tested on two systems: Abbott Architect ci8200 and Roche Integra 400 plus. Both analyzers use the spectrophotometric technique by coupling the transamination reaction to the oxidation-reduction reaction at NAD. The agreement of the results between the different techniques was evaluated using the Bland-Altman difference diagram and the Passing-Bablok and Deming regression line. RESULTS: There was a high concordance between the two assays: the equation of the Passing-Bablok line is YArchitect ​= ​−0,5625 ​+ ​0,9917 XIntegra with a correlation coefficient r(2) = 0.999. The Bland-Altman diagram shows that the mean bias between the two methods is of the order of 1.1 IU/L and the difference between the ALT measurements by Architect and Integra is in the range of −1.4 to 3.6. CONCLUSION: Our study shows a high correlation of the ALT assay results between the architect ci8200 and Integra 400 plus.