Iam carrying out a study whose purpose is TO ASSESS DISTAL AND PROXIMAL FACTORS RELATED TO MATERNAL NEAR MISS
The Study is a facility Based unmatched Case-control study, the dependent variable is therefore Maternal near-miss basing on WHO near-miss criteria. However, I am stuck on the number of cases and controls to use in this study
I would like to the following parameters to estimate the sample size were: confidence level of 95%, power of 80%, the case-control ratio of 1:3,
I started with the idea of using the Epi info 7 online calculator for unmatched case-control studies: Tried to input my parameters, Got stuck on the way: where I need to input the expected frequency of exposure in Cases and percent exposure among cases. Please what value do I input in these, remember am carrying out a study to assess maternal near miss
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