The estmeansd
package implements the methods of McGrath et
al. (2020)
and Cai et
al. (2021)
for estimating the sample mean and standard deviation from commonly
reported quantiles in meta-analysis. Specifically, these methods can be
applied to studies that report one of the following sets of summary
statistics:
Additionally, the Shiny app estmeansd implements these methods.
You can install the released version of estmeansd
from CRAN with:
install.packages("estmeansd")
After installing the devtools
package (i.e., calling
install.packages(devtools)
), the development version of estmeansd
can be installed from GitHub with:
devtools::install_github("stmcg/estmeansd")
Specifically, this package implements the Box-Cox (BC), Quantile
Estimation (QE), and Method for Unknown Non-Normal Distributions (MLN)
approaches to estimate the sample mean and standard deviation. The BC,
QE, and MLN methods can be applied using the bc.mean.sd()
qe.mean.sd()
, and mln.mean.sd()
functions, respectively:
library(estmeansd)
set.seed(1)
bc.mean.sd(min.val = 2, med.val = 4, max.val = 9, n = 100) # BC Method
#> $est.mean
#> [1] 4.210971
#>
#> $est.sd
#> [1] 1.337348
qe.mean.sd(min.val = 2, med.val = 4, max.val = 9, n = 100) # QE Method
#> $est.mean
#> [1] 4.347284
#>
#> $est.sd
#> [1] 1.502171
mln.mean.sd(min.val = 2, med.val = 4, max.val = 9, n = 100) # MLN Method
#> $est.mean
#> [1] 4.195238
#>
#> $est.sd
#> [1] 1.294908
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