This disclosure relates to classifiers of NF-κB pathway activation, devices, and methods of use thereof. In certain embodiments, the disclosure relates to methods comprising measuring changes in expression of genes controlled by p105 in a sample providing a detected p105 controlled gene expression pattern. In certain embodiments, the methods further comprise measuring changes in expression of genes controlled by p100 in a sample providing a detected p100 controlled gene expression pattern. In certain embodiments, the methods further comprise the step of comparing the detected p105 controlled gene expression patterns to a predetermined gene pattern and/or the detected p100 controlled gene expression patterns to a predetermined pattern.