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

dat.li2007R Documentation

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

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.

Concepts

medicine, cardiology, odds ratios, publication bias

Author(s)

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

Source

Li, J., Zhang, Q., Zhang, M., & Egger, M. (2007). Intravenous magnesium for acute myocardial infarction. Cochrane Database of Systematic Reviews, 2, CD002755. https://doi.org/10.1002/14651858.CD002755.pub2

See Also

dat.egger2001

Examples

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

## Not run: 

### 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"))


## End(Not run)

metadat documentation built on April 6, 2022, 5:08 p.m.