EQAS Program User Guide - QCNet

Chapter 5: EQAS Reports2Your ResultYour result is shown in the top left corner. A dash is shown in the “Your Result” section if a result for aregistered test was not received or was unreportable. The unit of measure associated with your resultdetermines the units for other mean and SD values displayed in the report. The peer group your resultwas compared against is shown above your result.3Comparative Statistics• This section shows the number of results received (N), robust estimates of the Mean and standarddeviation (SD), the coefficient of variation (CV), and expanded uncertainty (U) of the mean. The datashown represents your comparative statistics for Peer, Method, and All Results or Mode, ifapplicable.• The comparator for your laboratory is shown by a boxed outline.There are three levels of comparison. Ideally, your laboratory is compared to Your Peer, which is otherlaboratories using the same analyte, method, instrument, reagent combination as yours. However, for acomparison to be made at the peer level there must be a minimum of 9 reported results for that test.The next level of your result comparison is dependent on the data distribution, as uni-modal ormulti-modal. A Mode is a collection of peer or method groups that yield a similar result. It may includevarious instruments and reagents for that test. If less than 9 results are received for Your Peer, yourcomparison is Your Method for a uni-modal distribution or Your Mode for a multi-modal distribution ofdata. Your Method is other laboratories using the same analyte and method combinations for that test.However, for a comparison to be made at the method level there must be a minimum of 9 reportedresults for that uni-modal test. If there are less than 9 results received in the method you are comparedEQAS Program User Guide 47