ORmn1 {sasLM}

Odds Ratio and Score CI of two groups without strata by the MN method

Description

Odds ratio and its score confidence interval of two groups without stratification

Usage

  ORmn1(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 odds ratio 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::orscoreci function uses incremental or decremental search by the factor of 1.001 which gives only less than 3 significant digits.

Value

There is no standard error.

odd1

odd from the first group, y1/(n1 - y1)

odd2

odd from the second group, y2/(n2 - y2)

OR

odds ratio, odd1/odd2

lower

lower confidence limit of OR

upper

upper confidence limit of OR

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, RRmn1, RDmn, RRmn, ORmn

Examples

  ORmn1(104, 11037, 189, 11034)