Dear everyone :

I'm confused that how to build Risk score formula for survival analysis. I have been seen many articles involved the Risk score formula building, but I have spent a day to solved it but failed. can someone taken a example to show how to build it?

This is the article details:

Base on the expression level of five lncRNAs, we designed a risk-score formula for ccRCC patients’ survival prediction. The risk score formula is as following: Risk score= (1.43 × expression level of AC069513.4) + (0.81 × expression level of AC003092.1) + (1.64 × expression level of RP11-507K2.3) + (-6.56 × expression level of CTC-205M6.2) + (-1.72 × expression level of U91328.21).

but I don't know how to calculate the Risk score formular

Thank you very much!

Alex