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tocalculate the sample size

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  • #25801

    jasmin
    Participant

    I would like to study on effect of cardiac rehabilitation following CABG.If the population is 192 and I select 180 of those cases would it be sufficent to represent the population .I would like to take all the cases except if they do not follow the inclusion criteria.

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    #62494

    Mundorff
    Member

    In this situation, if the numbers are the actual state of the world, the notion of sampling is not relevant.  Do all 192 unless they don’t meet criteria.

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    #62496

    Murray
    Participant

    I would think that analysis of 180 of the cases would likely be a sufficient quantity, but then any conclusions that you reach based on this analysis would only apply to future patients that “follow the inclusion criteria”.  If you wanted your conclusions to apply to the entire population then you would have to choose your sample randomly or include data from all of the cases in your analysis.

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