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Thread: U shaped curve modelling

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    U shaped curve modelling




    Hello,

    Someone knows how to modelize and test a U shaped curve and if there is a specific procedure in SAS?
    Thanks for your help!

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    Re: U shaped curve modelling

    Would you mind providing some more details?
    I don't have emotions and sometimes that makes me very sad.

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    Re: U shaped curve modelling


    Hello,

    I estimate a risk of cardiovascular disease by categories of weight (1->8) throug a Cox model.
    And it seems that the risk is high for low and high weight, and low for middle weight. Thus I would like to modelize this by a "U shape" model.
    When I trace the plot "Incidence rate" By "Weight categories" , I get something which looks like a U curve. I would be able to prove it statistically.
    Thanks for your help

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