A1 Journal article (refereed)
Inter‐individual variation of the urinary steroid profiles in Swedish and Norwegian athletes (2020)
Mullen, Jenny; Bækken, Lasse Vestli; Törmäkangas, Timo; Ekström, Lena; Ericsson, Magnus; Hullstein, Ingunn R.; J Schulze, Jenny (2020). Inter‐individual variation of the urinary steroid profiles in Swedish and Norwegian athletes. Drug Testing and Analysis, 12 (6), 720-730. DOI: 10.1002/dta.2778
JYU authors or editors
Publication details
All authors or editors: Mullen, Jenny; Bækken, Lasse Vestli; Törmäkangas, Timo; Ekström, Lena; Ericsson, Magnus; Hullstein, Ingunn R.; J Schulze, Jenny
Journal or series: Drug Testing and Analysis
ISSN: 1942-7603
eISSN: 1942-7611
Publication year: 2020
Volume: 12
Issue number: 6
Pages range: 720-730
Publisher: John Wiley & Sons
Publication country: United Kingdom
Publication language: English
DOI: https://doi.org/10.1002/dta.2778
Open Access: Publication channel is not openly available
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67902
Abstract
In this study, we used over 11 000 urinary steroid profiles from Swedish and Norwegian athletes to determine both the inter‐ and intra‐individual variations of all steroids and ratios in the steroidal passport. Furthermore, we investigated if the inter‐individual variations could be associated with factors such as gender, type of sport, age, time of day, time of year and if the urine was collected in or out of competition.
We show that there are factors reported in today's doping tests that significantly affect the steroid profiles. The factors with the largest influence on the steroid profile was what type of sport classification the athlete belonged to as well as if the urine was collected in or out of competition. There were also significant differences based on what time of day and time of year the urine sample was collected. If these significant changes are relevant when longitudinally monitoring athletes in the steroidal module of the ABP, has to be further evaluated.
Keywords: doping; steroids; testing methods; urine; markers; variation; profiles (information); athletes
Free keywords: doping in sports; athlete biological passport; steroid profile; confounding factors; urinary steroids
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2020
Preliminary JUFO rating: 1