Cardiovascular Diseases: Too Much Sleep?

CARDIOVASCULAR DISEASES

When an epidemiologist begins to mine a mountain of case histories, death certificates and related data, he can be virtually sure to find: 1) evidence tending to confirm well-established theories, and 2) something totally unexpected. That is exactly what happened to Statistician E. Cuyler Hammond when he dug into the records of 352,000 men and 440,000 women enrolled nine years ago in the American Cancer Society's long-range epidemiological study.

As expected, Hammond told a heart-disease symposium at Albany Medical College last week, the death rates after age 40 are higher for both men and women if they smoke cigarettes, if...

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