EQAS Program User Guide - QCNet

Chapter 5: EQAS Reports• Your Batch Z-score:Your mean batch result – Comparator batch meanComparator batch SD• Reference ValuesThe target value for the batch result analyzed with the reference method (if available).Note: The reference values are provided for information only. No statistical comparisonsare provided against the reference values.Reference Values for the EQAS Therapeutic Drug Monitoring Program are weighed in amounts ofthe active chemicals in the sample.3Cycle Comparative Statistics by BatchThe cycle comparative statistics are grouped by batch. All four batches are represented in this section.The following results appear in each column for every comparator:All Results or Mode, Your Method , and Your Peer .If “All Results” has a multi-modal distribution of data, the results are separated into different modes andyour modal data is shown (Your Mode).• N: Number of data points in the batch.• Mean: Robust calculation of the mean.• SD: Robust calculation of the standard deviation.• CV: Coefficient of variation =Standard deviation x 100MeanEQAS Program User Guide 61