[R-meta] Calculating SMD from posttest only - is this possible?
@c @end|ng |rom |mb|@un|-|re|burg@de
Mon Oct 7 14:16:28 CEST 2019
Just to add to the responses by Wolfgang and James.
The Cochrane Handbook warns against combining SMDs based on change
scores (pre-post comparisons) and post-test comparisons (see
The reason is that the standard deviation used in the denominator of the
SMD is different for change scores and post-tests.
Best wishes, Guido
Dr. Guido Schwarzer
Institute of Medical Biometry and Statistics,
Faculty of Medicine and Medical Center - University of Freiburg
Postal address: Stefan-Meier-Str. 26, D-79104 Freiburg
Mail: sc using imbi.uni-freiburg.de
ORCID iD: https://orcid.org/0000-0001-6214-9087
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