[R-meta] Questions about the use of metaprop for the pooling of proportions

[Thiago Roza]

Dear Michael,

Thank you for your reply!

Do you think it would be possible to generate pooled proportions for
at least the most commonly reported suicide method in this case? (I
would organize my dataset in the following format: "suicide by
hanging" vs "other method of suicide", only two categories).

Thank you,

Thiago

Em seg., 7 de mar. de 2022 às 13:40, Michael Dewey
<lists using dewey.myzen.co.uk> escreveu:
>
> Dear Thiago
>
> What you have is compositional data which might prove a useful search
> term. A common way to analyse such data is by taking the ratios of the
> components to a reference one and then taking logs. However that is
> about the sum total of my knowledge of compositional data analysis and
> as far as I know there is no extant R package which deals with it.
> Others on the list may have better ideas.
>
> For future reference if you post on CrossValidated it is best to put a
> link in each of them so people can check if it has already been answered
> in the other place.
>
> Michael
>
> On 06/03/2022 16:36, Thiago Roza wrote:
> > Dear all,
> >
> > I am conducting a meta-analysis about characteristics of suicide
> > deaths in post-mortem studies. My aim is to describe pooled
> > proportions of key characteristics (biological sex, suicide site,
> > race, marital status, suicide method, the proportion of substance use
> > near death, proportion of psychiatric diagnosis prior to death, etc)
> > across the included studies. Initially, I thought that "metaprop" from
> > the package "meta" would be enough to pool all these proportions
> > across included studies. Nevertheless, some of these variables have
> > more than one category (i.e. suicide method has more than 10
> > categories: such as hanging, firearm, poisoning, etc), and the pooling
> > of the proportion of each suicide method separately produces results
> > which when summed up give more than 100% for the summed proportion of
> > all suicide methods. Therefore, my first question is: is it possible
> > to pool all those proportions using "metaprop"? If yes, could anyone
> > give an example about the coding for the pooling of proportions in the
> > case of suicide methods? If not, is there any other package that would
> > allow me to pool the aggregate proportion of suicide methods?
> >
> > Thank you,
> >
> > Thiago Roza
> >
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>
> --
> Michael
> http://www.dewey.myzen.co.uk/home.html