Tertiary Prevention:

Prevention of disability, poor quality of life, and death in persons with advanced stages of a disease.

Years Lived with Disability (YLD):

The number of years lived with a disability or non-fatal health outcomes.

Years of Life Lost (YLL):

The number of life years lost prior to a given age of expected survival, usually 65 years.

Definitions for this glossary were compiled from the following sources:

Dorland's Illustrated Medical Dictionary, 28th ed. Philadelphia: W.B. Saunders Co., 1994.

Medicine.Net. Medical terms and glossary. Available at http://www.medicinenet.com, 2001.

Medline plus (date of last update March 18, 2000). Available at http://www.nlm.nih.gov/.



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement