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Reputation: 1

SAS PHREG test for trend?

I am running a PHREG model with mortality as the outcome and quartiles of protein X as my predictor (where quartile 1= ref). I was able to get the HR for quartile 2, 3, and 4, and their respective p-values- which are not significant (0.8, 0.4, 0.2) and now wondering if there is a way to test for a trend in the HRs?? Any suggestions/tips for the analysis would be appreciated!

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