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Answer:
<h3>The option D) All of the above is correct</h3><h3>The major disadvantage of crude rates is that:</h3>- They may not allow for comparison of populations that differ
- They do not permit comparisons of populations that vary in age distribution.
- They are difficult to calculate from available data sources.
Hence options A ,B and C are correct
Step-by-step explanation:
Given that crude rate
To find the disadvantage of crude rate :
A crude rate is the number of new cases (or deaths) occurring in a specified , it can be expressed as the number of cases per 100,000 population at risk.
- They may not allow for comparison of populations that differ
- They do not permit comparisons of populations that vary in age distribution.
- They are difficult to calculate from available data sources.
Hence options A ,B and C are correct
<h3>∴ The option D) All of the above is correct.</h3>