Years of potential life lost before ages 65 and 85--United States, 1989-1990.

Years of potential life lost (YPLL) is a public health measure that reflects the impact of deaths occurring in years preceding a conventional cut-off year of age, usually 65 years. YPLL is calculated using final mortality data from CDC's National Center for Health Statistics (NCHS) (1) for the most recent year available and provisional mortality data (i.e., a 10% sample of deaths) (2) for the following year. This report summarizes final YPLL data for 1989 and provisional YPLL data for 1990.