[R-meta] Nestedness in meta-analysis data using R (metafor or metaSEM packages)

[James Pustejovsky]

Reza,

Here is a recent article provides a review of the main analytic approaches
available for the data structure that you've described:

   - Moeyaert, M., Ugille, M., Natasha Beretvas, S., Ferron, J., Bunuan,
   R., & Van den Noortgate, W. (2017). Methods for dealing with multiple
   outcomes in meta-analysis: a comparison between averaging effect sizes,
   robust variance estimation and multilevel meta-analysis. *International
   Journal of Social Research Methodology*, *20*(6), 559-572.

The question has come up periodically on the mailing list too, so you might
find past posts helpful. A few to get you started:

   -
   https://stat.ethz.ch/pipermail/r-sig-meta-analysis/2017-September/000197.html

   -
   https://stat.ethz.ch/pipermail/r-sig-meta-analysis/2017-August/000094.html

   -
   https://stat.ethz.ch/pipermail/r-sig-meta-analysis/2019-March/001479.html

   -
   https://stat.ethz.ch/pipermail/r-sig-meta-analysis/2018-October/001153.html


James

On Sun, Nov 3, 2019 at 7:36 PM Reza Norouzian <rnorouzian using gmail.com> wrote:

> Hi,
>
> I have 51 studies. These studies have produced 257 effect sizes (denoted
> y).
> In each study, each effect size is obtained some time (categorized as 1, 2,
> 3, 4) after a treatment. Also, in15 of the studies, some effect sizes have
> been reported on up to 4 correlated outcomes.
>
> What reasonable model using the library(metafor) [e.g., via rma.mv] or
> library(metaSEM) [e.g., via meta3] can capture the structure of my data
> described above?
>
> For concreteness, I'm providing demo data below.
>
> d <- read.csv("https://raw.githubusercontent.com/izeh/m/master/e.csv",
> h = T) # DATA
> # First 6 lines of DATA:
>
>           study.name            y        SD id outcome time 1
> Al.Ahm_Al.Jar  0.533733731 0.4286817  1       1    1          2
> Al.Ahm_Al.Jar  0.296116599 0.4132781  1       1    4          3
> Al.Ahm_Al.Jar -0.155386371 0.4267881  1       1    1          4
> Al.Ahm_Al.Jar  0.131015334 0.4384274  1       1    4          5
>     Al_Ajmi  3.444226818 0.2182068  2       1    1          6
>   Al_Ajmi  4.376457433 0.2090771  2       1    2
>
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>
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