metadat (version 1.4-0)

dat.li2007: Studies on the Effectiveness of Intravenous Magnesium in Acute Myocardial Infarction

Description

Results from 22 trials examining the effectiveness of intravenous magnesium in the prevention of death following acute myocardial infarction.

Usage

dat.li2007

Format

The data frame contains the following columns:

id	numeric	trial id number
study	character	first author or trial name
year	numeric	publication year
ai	numeric	number of deaths in the magnesium group
n1i	numeric	number of patients in the magnesium group
ci	numeric	number of deaths in the control group
n2i	numeric	number of patients in the control group

Author

Wolfgang Viechtbauer, , https://www.metafor-project.org

Concepts

medicine, cardiology, odds ratios, publication bias

Details

The dataset includes the results from 22 randomized clinical trials that examined the effectiveness of intravenous magnesium in the prevention of death following acute myocardial infarction. It is similar to the dataset dat.egger2001, with some slight differences in the included trials and data used.

See Also

dat.egger2001

Examples

### copy data into 'dat' and examine data
dat <- dat.li2007
dat

if (FALSE) {
### load metafor package
library(metafor)

### meta-analysis of all trials except ISIS-4
res <- rma(measure="OR", ai=ai, n1i=n1i, ci=ci, n2i=n2i, data=dat, method="EE", subset=-14)
print(res, digits=2)
predict(res, transf=exp, digits=2)

### meta-analysis of all trials including ISIS-4
res <- rma(measure="OR", ai=ai, n1i=n1i, ci=ci, n2i=n2i, data=dat, method="EE")
print(res, digits=2)
predict(res, transf=exp, digits=2)

### contour-enhanced funnel plot centered at 0
funnel(res, refline=0, level=c(90, 95, 99), shade=c("white", "gray", "darkgray"))
}