Ralf Bender's STATISTICS Page

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Welcome to my statistics page !

Here you will find some information about my speciality.

Some keywords regarding biostatistics:

Sample size estimation
Clinical trials
Epidemiology
Descriptive statistics
Nonparametric methods
Analysis of (co)variance
Repeated measurements
Regression analysis
Survival analysis
Response curves and time series
Meta-analysis

Some special fields of my interest:

Explanation of statistical results
Misuse of statistics in biomedical research
Time series models for EEG data
Measurement error in exposure data
Logistic regression for ordinal data
Threshold models for binary data
Time-action profiles of insulin preparations
Risk factors for diabetic complications
Nonlinear regression with correlated errors
Estimation of the number needed to treat (NNT)
Multiple comparisons in systematic reviews
Meta-analysis with very few studies

Contact details

Prof. Dr. Ralf Bender
Institute for Quality and Efficiency in Health Care
Head of the Department of "Medical Biometry"
Im Mediapark 8
D-50670 Cologne, Germany

Phone: +49 221 35685-451
Fax:   +49 221 35685-10

Ralf.Bender@iqwig.de

My qualifications:

First degree in statistics (TU Dortmund, 1989)
Ph.D. (Dr.rer.biol.hum., Hannover Medical School, 1992)
Certificate "Biometry in Medicine" (IBS-DR, GMDS, 1995)
Certificate "Epidemiology" (GMDS, DGSMP, IBS-DR, 1998)
Habilitation in "Medical Statistics and Epidemiology" (Bielefeld University, 2001)
Professor of "Medical Statistics and Epidemiology" (University of Cologne, 2007)

I am a member of the following societies:

Activities in professional organizations:

Statistical advisor of the Cochrane Metabolic and Endocrine Disorders Review Group, Düsseldorf, Germany (since February 2000)
Secretary of the working group "Statistical Methods in Medicine" of the German Region of the International Biometric Society (2000-2002)
Chairman of the working group "Statistical Methods in Medicine" of the German Region of the International Biometric Society (2002-2008)
Member of the Certificate Committee "Medical Documentation" (GMDS, DVMD, since June 2003)
Chairman of the Topic Action Group (TAG) "Multiplicity in Systematic Reviews" of the Statistical Methods Group (SMG) of the Cochrane Collaboration (2006-2010)
Member of the Advisory Council of the German Region of the International Biometric Society (2007-2011)
Member of the Sub-Committee "Statistics in Regulatory Affairs" of the International Society for Clinical Biostatistics (since August 2012)
Vice Chairman of the Subject Committee "Medical Biometry" of the German Society for Medical Informatics, Biometry & Epidemiology (GMDS) (2012-2014)
Vice Chairman of the Working Group "Therapeutical Research" of the German Society for Medical Informatics, Biometry & Epidemiology (GMDS) (since September 2014)
Chairman of the Subject Committee "Medical Biometry" of the German Society for Medical Informatics, Biometry & Epidemiology (GMDS) (2014-2016)
Member of the Subject Committee "Medical Biometry" of the German Society for Medical Informatics, Biometry & Epidemiology (GMDS) (2016-2020)
Member of the Editoral Board of the multidisciplinary Open Access Journal PLOS ONE (since April 2018)
Member of the Board of the German Society for Medical Informatics, Biometry & Epidemiology (GMDS) (since October 2023)

You can have a look at my selected bibliography.

You can download some SAS programs from my software page.

My favourite statistics links:

The World-Wide Web Virtual Library: Statistics

Dept. of Statistics of the University of Dortmund