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Thread: A question about OR

  1. #16
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    Re: A question about OR




    Quote Originally Posted by maartenbuis View Post
    A standard deviation increase in MMSE is associated with a (exp(.253*4.1)-1)*100 = 182% increase in the odds of being sattisfied with family life.
    maartenbuis, I get your calculation here, but how and when would such a calculation be useful? Can you give an example of how the calculation may be used to examine one's data or sample?
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    Re: A question about OR

    MMSE is not the main variable and persons good cognitive ability was not the inclusions criteria. That's why some have 0.

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    Re: A question about OR

    Seems as though you are using Logistic regression, will any other variables be in the model with mmse and satisfaction?

    Side question, I guess this opens the door to how would you quantified satisfaction with family life if these individuals have a null mental status. How is your dependent variable collected?
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    Re: A question about OR

    Quote Originally Posted by hlsmith View Post
    maartenbuis, I get your calculation here, but how and when would such a calculation be useful? Can you give an example of how the calculation may be used to examine one's data or sample?
    What I did with my computation was to get the odds ratio when MMSE was standardize to have a standard deviation of 1. If I had access to the data I would probably just standardize the variables rather than doing it like I did in my posts. So the answer to your question is: I would perform such calculations if I did not have (quick) access to the data.

    Sometimes, I do stuff like that when I first see the results of a model and try out different units of the explanatory variable to get a quick feel for the size of the effect. If I find the results of these preliminary computations useful, I would probably repeat it by creating new explanatory variables with the desired unit, as I am less likely to make an error that way...

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    Re: A question about OR


    This is a relevant question which I am discussing in the thesis.

    yes i have other variables, but they are not significant at all.

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