Skip to content

[R-meta] Accounting for baseline differences in meta-analysis

2 messages · Gladys Barragan-Jason, Gerta Ruecker

#
Dear all,
I would like to know how to take the baseline difference into account in
meta-analysis of the impact of a treatment on experimental data in which
the baseline of the control group is different from the baseline of the
treatment.
For now, I am using the post- means and SD of the control and the treatment
group (and the rma.mv function) and also the pre-post values of the
treatment group but I don't think this is correct and I am not sure how to
proceed.
Any advice?
Thanks a lot in advance.
Best regards,
Gladys
#
Dear Gladys,

An obvious approach would be to take the post values (or, equivalently, 
the change scores) as an outcome, and the baseline values as a covariate 
in a metaregression model.

Best,

Gerta

Am 28.01.2021 um 10:49 schrieb Gladys Barragan-Jason: