Extreme value analysis of gut microbial alterations in colorectal cancer

Gut microbes play a key role in colorectal carcinogenesis, yet reaching a consensus on which microbes remains challenging in part due to reliance on mean value estimates. We present an extreme value analysis for overcoming these limitations. By characterizing a power law fit to the relative abundances of microbes, we capture the same microbial signatures as more complex meta-analyses. Importantly, we show that our method is robust to the variations inherent in microbial community profiling and point to future directions for developing sensitive, robust analytical methods.