rateratio {fmsb}R Documentation

Calculate rate ratio and its confidence intervals

Description

Calculate rate ratio (a kind of relative risk) and its confidence intervals based on approximation, followed by null hypothesis (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 in exposed cohort group.

PT0

The observed person-time in non-exposed cohort group.

conf.level

Probability for confidence intervals. Default is 0.95.

Value

estimate

Calculated point estimate of 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[atmark]umin.net)

Examples

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

[Package fmsb Index]