Our main contributions in this area are as follows:

  1. A thorough mathematical treatment of the Marginal structural model (MSM) (Røysland, Bernoulli, 2010). This is the first complete mathematical analysis of this model.
  2. Development of an alternative to the MSM model, the name of the new method being: Sequential Cox regression (Gran et al, Statistics in Medicine, 2010). This is simpler and more intuitive than the MSM model, and less dependent on the instability of elaborate weighting procedures.
  3. Development of a Dynamic path analysis as a tool for analyzing direct and indirect effects in survival analysis (Fosen et al, Lifetime Data Analysis, 2006; Røysland et al, unpublished 2010).
  4. A general study of concepts of intervention and mediation (Aalen and Røysland, submitted, 2010).
  5. A dynamic approach for analyzing longitudinal data (Aalen and Gunnes, Biostatistics, 2010). Achievements in infectious disease are described by Birgitte Freiesleben de Blasio.
Published Feb. 22, 2011 6:29 PM - Last modified May 19, 2011 12:25 PM