In the clinical chemistry laboratory a method bias is usually determined by comparison of results with results from a number of other laboratories measuring the same sample material this interlaboratory comparison known as proficiency testing implies that the laboratory receive samples with an unknown concentration of an analyte with regular intervals. In teaching clinical medicine all of us are accustomed to moralize to our students that the good physician makes a diagnosis by listening to the patients story and then examining him the laboratory we tell them is a crutch with which we affirm our bedside impression of course whatever the. Clinical laboratory test interpretation 1 clinical laboratory test results are a very important parameter in diagnosis monitoring and screening 70 80 of decisions in diagnosis are based on laboratory results and more and more laboratory analyses are requested. Interpretation of clinical laboratory tests date commonly used indicators for diabetes chf asthma cancer nutrition blood glucose acid base glycosylated hemoglobin hgba1c diabetes interpretation of clinical laboratory tests date dka blood glucose 250mg dl 139mmol l and