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Thread: Repeated atypical measures..help needed

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    Repeated atypical measures..help needed




    Hey all,
    thanks again for the great group and assistance.

    I have a research of 30 patients (one sample) which performed cognitive tests in the following states:
    1.Baseline.
    2.at 3 months with no intervention
    3.at 6 months after intervention
    These are the same patients who underwent all 3 states.

    The cognitive measures are continuous parameters and i'm using SPSS.
    i'm wondering how to analyze them:
    1. Paired t test of 1-2 compared to 2-3
    2. Repeated measures with 1 as covariate ? is this "legal"?
    3. splitting as 2 groups of 1-2 and 2-3 so each has a pre score and a post score and performing a ANOCVA with the pre score as covariate (i.e. for 1-2 group the covariate values will be 1, and for 2-3 group the covriate values will be 2)

    This is an atypical cohort i'm aware...but any help will be greatly appreciated

    thanks in advance

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    Re: Repeated atypical measures..help needed

    Are time increments between observations truly the same (exactly 30 day) or would variability matter in your study?
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    Re: Repeated atypical measures..help needed

    Quote Originally Posted by hlsmith View Post
    Are time increments between observations truly the same (exactly 30 day) or would variability matter in your study?
    exactly 3 months between measure 1 and 2 and exactly 3 months between measure 2 and 3.
    during the 3 months between 2 and 3, the patients underwent therapeutic intervention.

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    Re: Repeated atypical measures..help needed


    Quote Originally Posted by XPeriment View Post
    exactly 3 months between measure 1 and 2 and exactly 3 months between measure 2 and 3.
    during the 3 months between 2 and 3, the patients underwent therapeutic intervention.
    help? please?

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