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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

Survival

Definition: The length of time people live. Survival can show whether treatments for a disease can prevent or delay death. Survival is usually expressed in terms of how long the people in a group remain alive. It sometimes is summarized by calculating an average. Survival also can be summarized by the number of people who are still alive after a certain length of time, such as 5 years later.

Example: Researchers examined the survival of people who had treatment for coronary artery disease. Of those people who also had diabetes, 87 percent were still alive after 3 years. Of those who did not have diabetes, 95 percent were still alive after 3 years.

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