tocalculate the sample size

This topic has 2 replies, 3 voices, and was last updated 12 years, 7 months ago by Murray.

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October 19, 2009 at 9:48 pm #25801

jasmin
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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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October 21, 2009 at 3:20 pm #62494

Mundorff
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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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October 23, 2009 at 3:44 pm #62496

Murray
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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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