Meta-analysis is a good way to synthesize data from multiple studies. Is it possible to conduct meta-analysis which contains a number of datasets, including longitudinal data (data was measured on the same subject for several times) and regular independent data?

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    $\begingroup$ What results do you intend to aggregate? If the study designs are different, then surely their results answer different questions and you can't just combine them. $\endgroup$ – Frans Rodenburg Aug 17 '18 at 0:57
  • $\begingroup$ On the other hand, if the longitudinal studies and the (presumably) cross sectional studies are estimating the same effect (for example, a treatment effect) then you could combine them the same way results are always combined in MA, by putting them on the same scale. $\endgroup$ – Marina_ANOVA Aug 17 '18 at 19:42

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