<div dir='auto'>Dear Raquel <div dir="auto"><br></div><div dir="auto">just found this https://www.google.com/url?sa=t&source=web&rct=j&url=https://cran.r-project.org/web/packages/metap/metap.pdf&ved=2ahUKEwigoZm5hbftAhVDsaQKHaOsBswQFjABegQIBRAC&usg=AOvVaw1ZjckiR1MBk5Fnyq3cmAp2</div><div dir="auto"><br></div><div dir="auto">You might want to have a look.</div><div dir="auto"><br></div><div dir="auto">Regards Tobias</div></div><div class="gmail_extra"><br><div class="gmail_quote">Am 05.12.2020 15:19 schrieb t.saueressig@gmx.de:<br type="attribution" /><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>Dear Raquel,</div><div dir="auto"><br /></div><div dir="auto">in Boerenstein et al. 2009 (Handbook) there is a description of a method to combine p values for a pooled p value. Maybe that would be a solution?</div><div dir="auto"><br /></div><div dir="auto">Regards,</div><div dir="auto"><br /></div><div dir="auto">Tobias Saueressig<br /><div dir="auto"><br /><div class="elided-text">Am 05.12.2020 12:21 schrieb Michael Dewey <lists@dewey.myzen.co.uk>:<br type="attribution" /><blockquote style="margin:0 0 0 0.8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Dear Raquel
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If you have the means or the difference in means as well then you can
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back-calculate what you need but if not I am afraid I can see no way
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forward although other smarter list readers may be able to help.
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Michael
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On 04/12/2020 18:45, Raquel Cumeras Olmeda wrote:
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> Dear all,
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>
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> We are trying to do a meta-analysis of metabolomics data.
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> In metabolomics, we study the changes of the concentrations of compounds in biofluids.
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>
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> So, for the data I am trying to analyze I have the p.value of the relevant compounds and the N of the patients and controls.
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>
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> We tried to do a forest plot, but we don't know how to do it with only the p.value and the N.
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>
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> Any help would be more than welcome!
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>
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> Raquel Cumeras
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>
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> -----------------------------------------------------------------------------------------------
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> Raquel Cumeras, Ph.D.
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> Marie Curie Postdoctoral Research Fellow
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> - Institut d'Investigaci� Sanit�ria Pere Virgili (IISPV, ES). Metabolomics Platform<http://metabolomicsplatform.com/>.
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> - University of California Davis (UC Davis, USA). Fiehn lab.
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> - Affiliated to Universitat Rovira i Virgili (URV, ES) and CIBERDEM (ISCIII, ES).
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>
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> website: https://raquelcumeras.wordpress.com/
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> e_mail: raquel.cumeras@iispv.cat<mailto:raquel.cumeras@iispv.cat> // rcumeras@ucdavis.edu<mailto:rcumeras@ucdavis.edu> // raquel.cumeras@urv.cat<mailto:raquel.cumeras@urv.cat>
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> ORCiD: 0000-0003-4663-4247
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> Pronouns: she/her
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> -----------------------------------------------------------------------------------------------
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>
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>
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> [[alternative HTML version deleted]]
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>
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>
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>
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>
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> _______________________________________________
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>
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--
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Michael
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http://www.dewey.myzen.co.uk/home.html
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