Clinical accuracy of DAT test in proficiency panel pre and post refresher training; comparison of two cut-off titres (1∶1,600 and 1∶3,200 serum dilution).

Each reading at every laboratory (n = 10) is treated as a separate sample in this analysis. There are 151 total readings of the DAT as all but one centre tested the same sera; in the final centre one serum sample was replaced with another and also tested by ITM, hence 151 readings.TP = True positive, FN = false Negative, FP = False Positive, TN = True Negative, CI = Confidence Intervals.