RRmn1: Relative Risk and Score CI of two groups without strata by by...

In sasLM: 'SAS' Linear Model

Relative Risk and Score CI of two groups without strata by by MN method

Description

Relative risk and its score confidence interval of the two groups without stratification

Usage

  RRmn1(y1, n1, y2, n2, conf.level=0.95, eps=1e-8)

Arguments

y1	positive event count of test (the first) group
n1	total count of the test (the first) group
y2	positive event count of control (the second) group
n2	total count of control (the second) group
conf.level	confidence level
eps	absolute value less than eps is regarded as negligible

Details

It calculates the relative risk and its score confidence interval of the two groups. The confidence interval is asymmetric, and there is no standard error in the output. This does not support stratification. This implementation uses uniroot function, which usually gives at least 5 significant digits. Whereas PropCIs::riskscoreci function uses cubic equation approximation which gives only about 2 significant digits.

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 confidence limit of RR
upper	upper confidence limit of RR

Author(s)

Kyun-Seop Bae [e-mail]

References

Miettinen O, Nurminen M. Comparative analysis of two rates. Stat Med 1985;4:213-26

See Also

RDmn1, ORmn1, RDmn, RRmn, ORmn

Examples

  RRmn1(104, 11037, 189, 11034)

sasLM documentation built on Oct. 2, 2024, 9:06 a.m.