[R-meta] Meta-regression question

[Hellen Mirr]

Hello

Apologies if this has already been answered and thank you in advance for
your help!

We are doing a multilevel meta-analysis and would like to run a
meta-regression to see differences across performance as a function of a
grouping variable we have.

Our dataset structure is as follows.
We have two patient groups (A and B) and their performance on a series of
tasks across several studies. All these tasks are of specific categories,
e.g. Computing, Imagery, Reading - etc. in the variable "task_category"

We have fit a multi-level meta as follows:
model1 <-rma.mv(yi, vi, random = ~ 1 | Study/Task, tdist=TRUE, data=df)
and then applied RVE as some studies reported multiple effect sizes for the
same patients
robust_model<- robust(model1, cluster = df$Study, adjust = TRUE) and also
with clubsandwich
coef_test () function for better small-sample adjustments.

We would now like to run a meta-regression to see if there are differences
in performance based on the category of tasks (which is coded in the
variable "task_category")

Would this be appropriate? As I am getting a bit confused and not sure this
is the right approach
metaregression_model <-rma.mv(yi, vi, random = ~ 1 | Study/Task, tdist =
TRUE, data = df,
                                 method = "REML",
                                 mods = ~ (task_category))


Thank you!

Best,
Hellen

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