SE.SMD_from_OR.CI {metaHelper}

Standard Error of from Confidence Intervals of Odds Ratio

Description

Calculates the standard error from an odds ratio confidence interval.

Usage

SE.SMD_from_OR.CI(CI_low, CI_up, sig_level = 0.05, two_tailed = TRUE)

Arguments

CI_low

lower odds ratio confidence interval limit

CI_up

upper odds ratio confidence interval limit

sig_level

the significance level

two_tailed

whether the two-tailed or one-tailed z statistics should be calculated

Details

This method uses multiple steps in the background: 1 Takes odds ratio (OR) limits and transforms them to log(OR) 2 Calculates the standard error for the log(OR) 3 Transforms the log(OR) standard error to standardized mean differences (SMD) standard error by multiplying it with sqrt(3)/pi

Value

Standard Error

References

Chinn S. A simple method for converting an odds ratio to effect size for use in meta-analysis. Stat Med. 2000 Nov 30;19(22):3127-31. doi: 10.1002/1097-0258(20001130)

Examples

# lower CI = 0.6, upper CI = 0.9
SE.SMD_from_OR.CI(0.6, 0.9)