Standard Article

Additive–Multiplicative Intensity Models

  1. Thomas H. Scheike

Published Online: 15 JUL 2005

DOI: 10.1002/0470011815.b2a11005

Encyclopedia of Biostatistics

Encyclopedia of Biostatistics

How to Cite

Scheike, T. H. 2005. Additive–Multiplicative Intensity Models. Encyclopedia of Biostatistics. 4.

Author Information

  1. University of Copenhagen, Copenhagen, Denmark

Publication History

  1. Published Online: 15 JUL 2005


The two standard regression models in survival analysis are the multiplicative Cox model and the additive Aalen model. These models postulate that covariate effects are either multiplicative or additive. This contribution reviews some recent work that combines multiplicative and additive effects into flexible models.


  • Aalen's additive risk model;
  • additive–multiplicative hazard model;
  • Cox's proportional hazards model;
  • Cox–Aalen model;
  • proportional excess models