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Review the
advantages and disadvantages of various types of rates.
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| Comparisons
of Rates |
Advantage |
Disadvantage |
| Crude
Rates |
Actual
summary rates
Readily calculable for
comparison |
Since
populations vary in composition (most notably, age) differences in
crude rates are difficult to interpret |
| Specific
Rates |
Homogeneous
groups
Detailed rates are useful
for epidemiological and public health purposes |
Difficult
to compare many subgroups of two or more populations |
| Adjusted
Rates |
Summary
statements
Differences in the
composition of groups is "removed" allowing unbiased
comparison |
Fictional
rates
Absolute magnitude depends
on standard population chosen
Opposing trends in subgroups
are masked |
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