Positions

Head of the biostatistics group at OUCRU
Associate professor in biostatistics at the University of Oxford

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About

I obtained my PhD in mathematical statistics in 1997. Since I wanted to continue my career in an applied field of research, I was very happy to start as senior statistician at the public health service of Amsterdam. There I specialised in the analysis of data that are collected in cohort studies, i.c. the Amsterdam Cohort Studies on HIV infection and AIDS (https://amsterdamcohortstudies.org). I performed and supervised many studies on infectious agents, especially those that are transmitted via sexual contact. Besides, I worked in several (medical) statistical research groups in the Netherlands, most notably in the academic medical center in Amsterdam. I joined OUCRU in January 2017 and became associate professor at Oxford University.

My research interests include: i) models for complex time-to-event data (competing risks, multi-state models), ii) models for complex longitudinal data, iii) prediction based on time-updated marker values, iv) causal inference, v) infectious diseases.

Publications
I performed, contributed to and supervised medical, epidemiological and statistical studies. These efforts are reflected in more than 150 articles as published in international journals and one book:
Ronald B. Geskus. Data Analysis with Competing Risk and Intermediate States. CRC Press, Boca Raton 2016. ISBN 9781466570351; see http://www.competingrisks.org

5 key recent research articles:
Geskus RB, Gonzalez C, Torres M, Del Romero J, Viciana P, Masia M, Blanco JR, Iribarren M, De Sanjose S, Hernandez-Novoa B, Ortiz M, Del Amo J; CoRIS-HPV Study Group. Incidence and clearance of anal high-risk human papillomavirus in HIV-positive men who have sex with men: estimates and risk factors, AIDS 2016, 2;30(1):37-44

Ruizendaal E, Tahita MC, Geskus RB, Versteeg I, Scott S, d’Alessandro U, Lompo P, Derra K, Traore-Coulibaly M, de Jong MD, Schallig HDFH, Tinto H, Mens PF. Increase in the prevalence of mutations associated with sulfadoxine–pyrimethamine resistance in Plasmodium falciparum isolates collected from early to late pregnancy in Nanoro, Burkina Faso. Malaria Journal 2017; 16: 179.

Daniela Katinka van Santen, Jannie Johanna van der Helm, Julia Del Amo, Laurence Meyer, Antonella D’Arminio Monforte, Matt Price, Charles Antoine Beguelin, Robert Zangerle, Mette Sannes, Kholoud Porter, Ronald Bertus Geskus, Maria Prins. Lack of decline in hepatitis C virus incidence among HIV-positive men who have sex with men during 1990-2014, Journal of Hepatology 2017; 67: 255-262

Gras L, de Wolf F, Smit C, Prins M, van der Meer JT, Vanhommerig JW, Zwinderman AH, Schinkel J, Geskus RB; for the ATHENA national observational cohort and the MOSAIC study. Changes in HIV RNA and CD4 cell count following acute HCV infection in chronically HIV-infected individuals. J Acquir Immune Defic Syndr. 2015 Apr 15;68(5):536-42

Jammbe Z Musoro, Aeilko H Zwinderman, Milo A Puhan, Gerben ter Riet and Ronald B Geskus. Validation of prediction models based on lasso regression with multiply imputed data. BMC Medical Research Methodology 2014, 14:116.

Personal Webpages

Nuffield Department of Medicine, University of Oxford
Google Scholar
ORCID