WebbPlink will divide the total score by the number of snps so you need to /22 after merging across the chromosomes You don't get this with imputed data Plink doesn't divide by Nsnps Note: Plink treats the effect as if its the difference between homozygotes not the additive increment of a single risk allele WebbPLINK is a free, open-source whole genome association analysis toolset, designed to perform a range of basic, large-scale analyses in a computationally efficient manner. …
1. QC of Base Data - Basic Tutorial for Polygenic Risk Score …
http://zzz.bwh.harvard.edu/plink/reference.shtml Webb比如一个位点有AA或者AT或者TT,那么就可以计算A的基因频率和T的基因频率,qA + qT = 1,这里谁比较小,谁就是最小等位基因频率,比如qA = 0.3, qT = 0.7, 那么这个位点的MAF为0.3. 之所以用这个过滤标准,是因为MAF如果非常小,比如低于0.02,那么意味着大 … ground transportation in chicago
Tutorial for Polygenic Risk Score - KCNI Knowledge Base
Webb16 jan. 2024 · When PLINK 1.07 --mendel was used either with --set-me-missing or without --make-bed/--recode, it would set some Mendel errors to missing before all errors were … WebbMinor allele frequency files. Minor allele frequency files format is the same as that of PLINK. The columns are: CHR Chromosome number of the SNP. SNP rs ID of the SNP (e.g. rs19800301). A1 Non-effect allele. A2 Effect allele (encoded as 1 in PLINK bed file). MAF Minor allele frequency; NCHROBS Number of samples times 2. Webb31 jan. 2024 · In about 5% of my data, this is not the case, meaning the ALT allele has the bigger frequency. I ran the pre-analysis QC (reminder: it included “--maf 0.001” filter) and the Case-Control analysis (using --assoc) twice: First I let PLINK work as usual, with the A1/A2 switching. In the second time I forced A2 as the “reference allele ... film alas roban