[R-meta] Proportional meta-analysis

Michael Dewey lists at dewey.myzen.co.uk
Sun Feb 11 14:28:30 CET 2018

Dear list colleagues

before replying to this you may like to examine the identical question 
(and possible answers) posted elsewhere


so as to avoid duplicating effort.


On 09/02/2018 19:46, Ahmed Tarek wrote:
> Dear All,
> In a previous email I have been explaining about a proportional meta 
> analysis I have been performing. I am working on comparing the retention 
> rates of different materials. I first took the approach of grouping 
> different materials with similar follow up times , and calculating a 
> summary proportion of all materials, however I later found out that 
> performing a moderator analysis ( in this case “materials”) would only 
> compare the materials against the summary proportion (?) , which is not 
> my aim. I aim to see how each material performed, and compare directly 
> between them. For example, I have materials A,B,C,D and I wish to 
> compare the retention between A and B, to see if they are significantly 
> different.
> So I am thinking I should calculate a summary proportion for each 
> material alone, and then perhaps conduct a chi square test? to see if 
> the summary means of each material is different?
> I would really appreciate any input.
> Attached is the summary proportion of all materials reporting retention 
> after 3 years. For my paper, I want to highlight that the GI material is 
> significantly worse than the Auto material. Could I still do that with 
> moderator analysis?
> Regards,
> Ahmed Bedir
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