The performance of delta check methods.
The percentage of mislabeled specimens detected (true-positive rate) and the percentage of correctly labeled specimens misidentified (false-positive rate) were computed for three previously proposed delta check methods and two linear discriminant functions. The true-positive rate was computed from a set of pairs of specimens, each having one member replaced by a member from another pair chosen at random. The relationship between true-positive and false-positive rates was similar among the delta check methods tested, indicating equal performance for all of them over the range of false-positive rate of interest. At a practical false-positive operating rate of about 5%, delta check methods detect only about 50% of mislabeled specimens; even if the actual mislabeling rate is moderate (e.g., 1%), only abot 10% of specimens flagged a by a delta check will actually have been mislabeled.
D001639:Bicarbonates / Q000097:blood; D001774:Blood Chemical Analysis / Q000592:standards*; D001800:Blood Specimen Collection / Q000592:standards*; D001806:Blood Urea Nitrogen / Q000379:methods; D002712:Chlorides / Q000097:blood; D003404:Creatinine / Q000097:blood*; D004573:Electrolytes / Q000097:blood*; D005189:False Positive Reactions; D006801:Humans; D011188:Potassium / Q000097:blood; D011786:Quality Control; D012964:Sodium / Q000097:blood; D013997:Time Factors
D001639:Bicarbonates; D002712:Chlorides; D004573:Electrolytes; D012964:Sodium; D003404:Creatinine; D011188:Potassium