This paper describes a method for creating a confidence interval for the ratio of rates using the score statistic. This non-iterative and easy to apply procedure produces confidence intervals that are suitable for use with Poisson data and simulation results indicate that it is close to the nominal level for a wide range of scenarios.
Bibliographical noteA correction for this article exists in Statistics in Medicine, vol. 23, issue 22, p. 3549. DOI: 10.1002/sim.2046
- confidence interval
- coverage probability
- poisson rates
- rate ratio