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Stat Med. 2004 Jan 15;23(1):93-104.

Improved estimates of floating absolute risk.

Author information

1
International Agency for Research on Cancer, Lyon, France. plummer@iarc.fr

Abstract

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.

PMID:
14695642
DOI:
10.1002/sim.1485
[Indexed for MEDLINE]
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