PhD Engineer

Subject: Biostatistics


Since 2014 : Methodologist-biostatistician in the Methodology and Biostatistics unit (Clinical Research and Innovation Department) of the University Hospital of Nantes.

PhD thesis defended in 2018 : "Screening of problematic gambling behaviors on the Internet”.

Since 2018 : Engineer (PhD) in the SPHERE unit.

Research area:

Gambling disorder: development of predictive models for the screening of problematic gamblers on the Internet, co-supervising of Marianne Balem’s PhD thesis "Impact of the COVID-19 pandemic on online gambling in France and Sweden".

Psychometrics: methodological development for the identification of response shift with more than two measurement times.

Illustration 'About-us'


Response shift
Gambling disorder
Latent variable modeling
Predictive modelling
Machine learning


icon publication

Development and validation of a prediction model for online gambling problems based on players' account data

Perrot B, Hardouin J, Thiabaud E, Saillard A, Grall-Bronnec M, Challet-Bouju G.

J Behav Addict. 
2022 Sep 20;11(3):874-889
icon publication

Impact of wagering inducements on the gambling behaviors of online gamblers: A longitudinal study based on gambling tracking data.

Marianne Balem, Bastien Perrot, Jean-Benoit Hardouin, Elsa Thiabaud, Anaïs Saillard, Marie Grall-Bronnec, Gaëlle Challet-Bouju

icon publication

Modeling Early Gambling Behavior Using Indicators from Online Lottery Gambling Tracking Data: Longitudinal Analysis.

Challet-Bouju G, Hardouin J-B, Thiabaud E, Saillard A, Donnio Y, Grall-Bronnec M, et al.

Journal of Medical Internet Research
Illustration publications


  • Faculty of pharmaceutical sciences, Nantes (France):
    • DFGSP2 (second year): Computer science
    • DFGSP3 (third year): Analysis of advertising material

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