fmsb: rateratio – R documentation

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rateratio

Calculate incidence rate ratio and its confidence intervals

Description

Calculate incidence rate ratio (a kind of relative risk) and its confidence intervals based on approximation, followed by null hypothesis (incidence rate ratio equals to 1) testing.

Usage

rateratio(a, b, PT1, PT0, conf.level=0.95)

Arguments

`a`	The number of disease occurence among exposed cohort.
`b`	The number of disease occurence among non-exposed cohort.
`PT1`	The observed person-time of the exposed cohort.
`PT0`	The observed person-time of the unexposed cohort.
`conf.level`	Probability for confidence intervals. Default is 0.95.

Value

`estimate`	Calculated point estimate of incidence rate ratio.
`conf.int`	A numeric vector of length 2 to give upper/lower limit of confidence intervals.
`p.value`	The significant probability of the result of null-hypothesis testing.

Author(s)

Minato Nakazawa minato-nakazawa@umin.net http://minato.sip21c.org/

References

Rothman KJ (2012) Epidemiology: An Introduction. 2nd Ed., Oxford University Press, Oxford.

Examples

res <- rateratio(136, 1709, 22050, 127650)
 str(res)
 print(res)

fmsb

Functions for Medical Statistics Book with some Demographic Data

v0.7.1

GPL (>= 2)

Authors

Minato Nakazawa <minato-nakazawa@umin.net>

Initial release

2021-05-09