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    testing a prognostic score




    Hi, can anyone please help me? I have to see to how a prognostic score correlates with patients' evolution, and by that I mean: mortality, days of hospitalization and hospitalization costs. That means correlation between a discrete variable and a categorical (mortality) and two continuous variables, right?
    I was thinking about ANOVA, but I'm not really sure.
    Help, please!

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    Re: testing a prognostic score

    How does ths score look like, on what scale is it measured? What is the study design,
    longitudinal, retrospective, or something else? How large is your sample?

    With kind regards

    K.

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    Re: testing a prognostic score

    The score is made up of 5 components (clinical and laboratory parameters) and divides the patients into 9 groups (scores of 0 to 8). It's a retrospective study and it includes 170 patients.
    Thank you!

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    Re: testing a prognostic score

    If you simply want to know whether score and the other parameters are
    significantly associated, then you could use Spearman correlation
    (for costs and lenght of stay) and a U-test (compare deceased with
    non-deceased with regards to score).

    With kind regards

    K.

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    sprite (06-30-2013)

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    Re: testing a prognostic score

    I had figured it out about Spearman correlation, it was the mortality that I did not know how to correlate. I knew t-test wasn't exactly what I needed and I didn't know what u-test was all about. Looked it up, found it, got it. Thank you very much, that really helped me a lot!

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    Re: testing a prognostic score


    Was this pre-existing score instrument or did you devise it.
    Stop cowardice, ban guns!

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