U.S. life expectancy tops 78 for the first time

Federal report cites decline in heart disease, other major causes of death

ATLANTA - For the first time, U.S. life expectancy has surpassed 78 years, the government reported Wednesday, although the United States continues to lag behind about 30 other countries in estimated life span.

The increase is due mainly to falling mortality rates in almost all the leading causes of death, federal health officials said. The average life expectancy for babies born in 2006 was about four months greater than for children born in 2005.

Japan has the longest life expectancy — 83 years for children born in 2006, according to World Health Organization data. Switzerland and Australia were also near the top of the list.