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Thread: Power Calculation

  1. #1
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    Unhappy Power Calculation




    Hi Guys,
    Need your help please.
    I performed a study- 2 groups (independent) both had 55 patients.
    However my supervisor advises that I perform a prospective power calculation
    How do I do this? I have had a google but finding it incredibly hard.
    Very confused.
    Thank you

  2. #2
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    Re: Power Calculation

    What was your p-value? And what value did you use for alpha?
    I don't have emotions and sometimes that makes me very sad.

  3. #3
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    Re: Power Calculation

    Hi There
    I used P=0.05 as statistically significant when I compared the 2 groups, each contained n=55
    I performed a re-audit. The original audit had 55 subjects and so when I re-audited I chose 55 subjects, but I think this was failing of the study

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    Re: Power Calculation

    Sounds like 0.05 was your alpha level. What what the p-value from the test you performed?
    I don't have emotions and sometimes that makes me very sad.

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    Re: Power Calculation

    What test did you use for re-audit.
    Stop cowardice, ban guns!

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    Re: Power Calculation

    p value was 0.05

  7. #7
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    Re: Power Calculation


    test used for re-audit ie when i compared results obtained within audit 1 to those obtained in audit 2 were pearson chi square but sometimes Fisher Exact for categorical data

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