ratedifference {fmsb} | R Documentation |
Calculate incidence rate difference (a kind of attributable risk / excess risk) and its confidence intervals based on approximation, followed by null hypothesis (incidence rate difference equals to 0) testing.
ratedifference(a, b, PT1, PT0, CRC=FALSE, conf.level=0.95)
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. |
CRC |
Logical. If TRUE, calculate confidence intervals for each incidence rate. Default is FALSE. |
conf.level |
Probability for confidence intervals. Default is 0.95. |
estimate |
Calculated point estimate of incidence rate difference. |
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. |
Minato Nakazawa minato-nakazawa@people.kobe-u.ac.jp https://minato.sip21c.org/
Rothman KJ (2012) Epidemiology: An Introduction. 2nd Ed., Oxford University Press, Oxford.
res <- ratedifference(136, 1709, 22050, 127650, CRC=TRUE) str(res) print(res)