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Polygenic risk score percentile cutoff

Dear everyone,

I working on PRS using information from PGS catalogue, however my data from illumina infinium GDA was not covered all SNP in each PGS catalogue just only 10-20%.

I would like to know that which percentile should I use as cutoff from Z score in PRS plot.

Edgar

gwas odds beta

1 answer

Hi Edgar, you need to use imputation to use the genotyped to get better coverage of the SNPs in the genome. Usually people use an imputation server like Michigan (https://imputationserver.sph.umich.edu) or TopMed (https://topmedimpute.readthedocs.io/en/latest/) for this.

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