confIntRiskDiff: Confidence interval for a risk difference

In felix-hof/biostatUZH: Misc Tools of the Department of Biostatistics, EBPI, University of Zurich

Confidence interval for a risk difference

Description

Compute a confidence interval for a risk difference based on Wald and Wilson confidence intervals for the individual risks.

Usage

confIntRiskDiff(x, n, conf.level = 0.95)

Arguments

x	Vector of length 2, number of successes in each group.
n	Vector of length 2, total number of trials in each group.
conf.level	Confidence level for confidence interval. Default value is 0.95.

Value

A list with the entries:

• rd: Estimated risk difference.

• CIs: Data.frame containing confidence intervals for the risk difference.

Author(s)

Leonhard Held

References

DG Altman, D Machin, TN Bryant, MJ Gardner. Statistics with confidence, 2nd Edition, 2000, Chapter 6

See Also

wilson, confIntRiskRatio, confIntOddsRatio.

Examples

x <- c(30, 50)
n <- c(100, 120)
confIntRiskDiff(x = x, n = n)$CIs

felix-hof/biostatUZH documentation built on Sept. 27, 2024, 1:48 p.m.