RRLI {LBI}

Relative Risk and its Likelihood Interval between two groups without strata

Description

Relative risk and its likelihood interval between two groups without stratification

Usage

  RRLI(y1, n1, y2, n2, conf.level=0.95, k, eps=1e-8)

Arguments

y1

positive event count of test (the first) group

n1

total count of the test (the first) group. Maximum allowable value is 1e8.

y2

positive event count of control (the second) group

n2

total count of control (the second) group. Maximum allowable value is 1e8.

conf.level

approximate confidence level to calculate k when k is missing.

k

1/k likelihood interval will be provided

eps

absolute value less than eps is regarded as negligible

Details

It calculates relative risk and its likelihood interval between the two groups. The likelihood interval is asymmetric, and there is no standard error in the output. This does not support stratification.

Value

There is no standard error.

p1

proportion from the first group, y1/n1

p2

proportion from the second group, y2/n2

RR

relative risk, p1/p2

lower

lower likelihood limit of RR

upper

upper likelihood limit of RR

Author(s)

Kyun-Seop Bae [e-mail]

Examples

  RRLI(7, 10, 3, 10)
  RRLI(3, 10, 7, 10)