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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.

 

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Absolute Risk

Definition: The probability or chance that a person will have a medical event. Absolute risk is expressed as a percentage. It is the ratio of the number of people who have a medical event divided by all of the people who could have the event because of their medical condition.

Example:

For example, research studies have found that among 10,000 people age 75 and over who take a drug like ibuprofen for osteoarthritis pain, 15 of them will die from stomach bleeding. The absolute risk of dying from stomach bleeding is 15 out of 10,000, or 0.15 percent of people taking ibuprofen.

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