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[R-meta] Collate event/proportion data from Pretest-Posttest controlled studies and one-group Pretest-Posttest studies

Wolfgang Viechtbauer 
Dear David,

If I understand your query correctly, you are asking if one can combine studies that provide 2x2 table data (for which one can compute measures such as RR and OR) and studies that provide pre-test post-test counts for a single group. If so, for the latter, one can compute measures such as the marginal log risk ratio and the marginal log odds ratio:

https://wviechtb.github.io/metafor/reference/escalc.html#outcome-measures-for-change-or-matched-pairs

Note that you will either need the paired 2?2 tables for such studies or the marginal table but then you have to make a guestimate of the correlation in the paired 2x2 table data.

Best,
Wolfgang

Thread (3 messages)

David Pedrosa Collate event/proportion data from Pretest-Posttest controlled studies and one-group Pretest-Posttest studies Jun 16 Wolfgang Viechtbauer Collate event/proportion data from Pretest-Posttest controlled studies and one-group Pretest-Posttest studies Jun 20 David Pedrosa Collate event/proportion data from Pretest-Posttest controlled studies and one-group Pretest-Posttest studies Jun 22