Page "Disease" Paragraph 31

The quality-adjusted life year ( QALY ) and disability-adjusted life year ( DALY ) metrics are similar, but take into account whether the person was healthy after diagnosis.

In addition to the number of years lost due to premature death, these measurements add part of the years lost to being sick.

Unlike YPLL, these measurements show the burden imposed on people who are very sick, but who live a normal lifespan.

A disease that has high morbidity, but low mortality, will have a high DALY and a low YPLL.

In 2004, the World Health Organization calculated that 1. 5 billion disability-adjusted life years were lost to disease and injury.