C9 and colorectal cancer: log(P/(1-P) = -7.8709 + 4.5956 × IGFBP2 + 0.2732 × ITIH3 + 0.0909 × LRG1 + 0.1015 × C9 -3.2205 × CNDP1 + 0.0239 × ORM1 + 0.0811 × SERPINA1, where P is a value between 0 and 1 that represents the probability of the event (colorectal cancer).