Thanks
I have access to population level WGS vcf files (pVCF)
In pVCF we may have several participants like the image below
If I have a list of participants IDs for colon cancer, can I calculate variant allele frequency and count (AF, AC) using pVCF files or for a certain cancer type I must use individual-level WGS vcf files (gVCF) ?
Thanks for any intuition
The only way to answer this question is to know what the research question of interest is. Without that knowledge it is impossible to choose one or the other. Once you know that, you need to study what are the differences between ICD9 and ICD10 codes for the individuals that are the same and different, then try to figure out why the results are so discrepant.
We cannot help you with any of that without more information.