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st: Meta analysis of subgroups in Stata using the -by- option
I am trying to perform subgroup analyses within a larger meta analysis of
effect sizes (odds ratios). The meta analysis commands appear to have
installed successfully (in version 9.2) and all other meta & metan commands
are working. The analyse -by variable- option appears to exist as an option
in the metan window, but the analysis itself will not run. I keep getting
the response that "option by() not allowed r(198)", regardless of whether
the commands are given via the pop-up window or typed in directly as -metan
Please could you give me some pointers on how to get this command to work?
I haven't been able to find information on how to deal with this elsewhere.
If not, is anyone aware of an alternative method that I could try, please?
Thank you! I'd appreciate any help you could give me.
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