Modelling continuous exposures with a 'spike' at zero: a new procedure based on fractional polynomials

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Patrick Royston1, Willi Sauerbrei, Heiko Becher

  • 1Hub for Trials Methodology Research, MRC Clinical Trials Unit and University College London, 222 Euston Road, London NW1 2DA, UK. pr@ctu.mrc.ac.uk

Statistics in Medicine
|March 2, 2010
PubMed

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