DHSS Home State Home Ask Us Disclaimer   
  Module IV
dot Home
dot Objectives
dot Using Statistical Measures
dot Frequency Distributions
 - Ratios
 - Proportions
 - Rates
dot  - Incidence Rates
 - Rate Ratios
 - Prevalence Rates
dot  - Crude Rate
 - Cause-Specific Rate
 - Other Specific Rates
dot  - Relative Risk
 - Odds Ratio
dot Outbreak Exercises
dot Quiz
dot Outline

Statistical Measures

Group of men

Morbidity Frequency Measures

Rate Ratios

Rate Ratio is another tool that is helpful for comparing rates between groups.

A rate ratio compares the rates of disease in two groups that differ by demographic characteristics or exposure history. The rate for the group of primary interest is divided by the rate for a comparison group.

Group of womenRate ratios may be calculated for incidence rates (including attack rates) or for mortality rates, discussed later.