Clinical proficiency testing establishes that the diagnosis of diabetes mellitus can be influenced by different methodology
In 2003 the Expert Committee on the Diagnosis and Classification of Diabetes Mellitus of American Diabetes Association (ADA) introduced several changes to the diagnostic criteria for diabetes and for lesser degrees of impaired glucose regulation (IFG/IGT) established in 1997 by International Expert Committee. In 2004 the ADA published a new statement about diagnosis and classification of diabetes mellitus. (Table 1) However, there was no recommendations about specifics glucose measurement methods in clinical laboratory. Currently, Brazilian laboratories use on several methods, mainly, glucose oxidase (oxidase) and hexokinase. Taken together, one can argue if diagnosis of diabetes mellitus could be influenced by different methods and methodologies assay in Brazilian and Latin American clinical laboratories.