Early Warning of Suspected Doping from Biological Passport Based on Multivariate Trends

Early Warning of Suspected Doping from Biological Passport Based on Multivariate Trends / António Júlio Nunes, Paulo Paixão, Jorge Proença, Ricardo J.N. Bettencourt da Silva. - (International Journal of Sports Medicine 41 (2020) 1 (January); p. 44-53).
- PMID: 31810403.
- DOI: 10.1080/02640414.2019.1700669


The indirect identification of doping in sports can be performed by assessing athletes' hematological perturbations from the analysis of blood collected on different occasions. Because prosecution for doping based on this information requires expensive and time-consuming interpretation of blood analysis results by various expert hematologists, mathematical data screening is performed to decide which cases should be forwarded to hematologists. The current Bayesian and univariate screening of data does not process the multivariate trends of blood parameters or take the time interval between samplings into account. This work presents a computational tool that overcomes these limitations by calculating a single score, the hematological perturbation index (HPIx), for which a threshold is defined above which hematologists should be asked to assess the athlete's biological passport. The doping detection from this index, normalized for days difference between samplings based on 3, 4 or 5 consecutive samplings, is associated with true positive result rates (TP) not below 98% and false positive result rates (FP) less than 0.9%. Therefore, this tool can be useful as an early warning system of hematological perturbations to decide which athletes should be more closely monitored and which biological passports should be forwarded to hematologists for medical interpretation of data.


Research / Study
17 September 2019
Bettencourt da Silva, Ricardo J.N.
Nunes, António Júlio
Paixão, Paulo
Proença, Jorge
Other organisations
Autoridade Antidopagem de Portugal (ADoP) - Anti-Doping Authority Portugal
Lusophone University of Humanities and Technologies - Universidade Lusófona de Humanidades e Tecnologias
Universidade de Lisboa (ULisboa) - University of Lisbon
Universidade NOVA de Lisboa - NOVA University Lisbon
Analytical aspects
Testing method development
Athlete Biological Passport (ABP)
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Date generated
14 January 2020
Date of last modification
17 January 2020
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