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Glossary of Terms

We know that many of the concepts used on this site can be difficult to understand. For that reason, we have provided you with a glossary to help you make sense of the terms used in Comparative Effectiveness Research. Every word that is defined in this glossary should appear highlighted throughout the Web site. When you come upon a highlighted term and would like to read the full definition, you can either click on the word to visit the glossary or roll your mouse over the word for a pop-up definition.

 

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Life Expectancy

Definition: The average amount of time a person will live after a certain starting point, like birth or the diagnosis of a disease. The calculation is based on statistical information comparing people with similar characteristics, such as age, gender, race/ethnicity, and health.

Example: For example, in the United States the life expectancy from birth for men and women combined is 78.1 years. In England, it is 78.7, and in China it is 72.9 years.