RRmn1 {sasLM}

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)