Improved estimates of floating absolute risk

Stat Med. 2004 Jan 15;23(1):93-104. doi: 10.1002/sim.1485.


Floating absolute risks are an alternative way of presenting relative risk estimates for polychotomous risk factors. Instead of choosing one level of the risk factor as a reference category, each level is assigned a 'floated' variance which describes the uncertainty in risk without reference to another level. In this paper, a method for estimating the floated variances is presented that improves on the previously proposed 'heuristic' method. The estimates may be calculated iteratively with a simple algorithm. A benchmark for validating the floated variance estimates is also proposed and an interpretation of floating confidence intervals is given.

Publication types

  • Comment

MeSH terms

  • Algorithms
  • Confidence Intervals
  • Data Interpretation, Statistical
  • Dose-Response Relationship, Drug
  • Humans
  • Risk Assessment / statistics & numerical data*