Variation in life expectancy during the twentieth century in The United States

  title={Variation in life expectancy during the twentieth century in The United States},
  author={David W Smith and Benjamin S. Bradshaw},
The National Center for Health Statistics (NCHS) reports life expectancy at birth (LE) for each year in the United States. Censal year estimates of LE use complete life tables. From 1900 through 1947, LEs for intercensal years were interpolated from decennial life tables and annual crude death rates. Since 1948, estimates have been computed from annual life tables. A substantial drop in variation in LE occurred in the 1940s. To evaluate these methods and examine variation without artifacts of… CONTINUE READING
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