Hi All, I've been working on my own survival analysis of PDAC, following the tutorial Survival analysis of TCGA patients integrating gene expression (RNASeq) data, but after I separated the tumor and non-tumor samples, I found that there were 179 tumor samples but only 4 non-tumor samples. I don't have too much experience with bioinformatics but I believe that 4 samples does not carry enough statistical weight even though they're normal samples to compare the cancer against and I was wondering if someone could confirm or correct me? If 4 samples is not enough, does anyone know how to find non-tumor samples in other databases like GEO? Thanks
Question: How many non-tumor samples needed for survival analysis?
4.1 years ago by
jzhou • 20
jzhou • 20 wrote:
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