**20**wrote:

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?

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

Didn't read the article, but it looks like a simple formula, multiply each expression with some weight then sum all.

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