[Turing-Southampton] S3RI seminar: Derek Young (University of Kentucky, Thursday 16 December (2 PM)

[Chieh-Hsi Wu]

Dear all,

Hope everyone is having a good week!

Just a reminder that at today's S3RI seminar at 2 PM, Dr Derek Young (University of Kentucky) will be presenting his work on

"Hyperrectangular Tolerance and Prediction Regions for Setting Multivariate Reference Regions in Laboratory Medicine."

Please see below for the details of the talk and how to join the seminar online.



Hope to see you at the seminar later today!



Kind regards,

Jessie



Hyperrectangular Tolerance and Prediction Regions for Setting Multivariate Reference Regions in Laboratory Medicine
Derek Young (University of Kentucky)

Reference regions are widely used in clinical chemistry and laboratory medicine to interpret the results of biochemical or physiological tests of patients. There are well-established methods in the literature for reference limits for univariate measurements, however, only limited methods are available for the construction of multivariate reference regions. This is because traditional multivariate statistical regions (e.g., confidence, prediction, and tolerance regions) are not constructed based on a hyperrectangular geometry. We address this problem by developing multivariate hyperrectangular nonparametric tolerance regions for setting the reference regions. Our approach utilizes statistical data depth to determine which points to trim and then the extremes of the trimmed dataset are used as the faces of the hyperrectangular region. Extensive coverage results show the favorable performance of our algorithm, provided a minimum sample size criterion is met. Our procedure is used to obtain reference regions for addressing two important clinical problems: (1) characterizing insulin-like growth factor concentrations in the serum of adults and (2) assessing kidney function in adolescents.


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