Part 3: Where does CNA apply? · Module 6
Every row is a "case"
What Counts as a "Case"?
In CNA, the thing you compare is called a case , and every case becomes one row in your data table. In immunization work, a case can sit at almost any level of the system:
Please don't mix facilities and districts in the same table. It's like comparing a single market stall to an entire shopping mall and wondering why the numbers look strange. Every case must sit at the same level, so pick one unit and stay loyal to it for the whole analysis.
What You Will Be Able to Do
- Define what a 'case' is in a CNA study.
- Choose an appropriate unit of analysis for a question.
- Explain why mixing levels breaks the comparison.