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U-M study: Life and death during the Great Depression
Date:9/28/2009

ANN ARBOR, Mich.---The Great Depression had a silver lining: During that hard time, U.S. life expectancy actually increased by 6.2 years, according to a University of Michigan study published in the current issue of the Proceedings of the National Academy of Sciences.

Life expectancy rose from 57.1 in 1929 to 63.3 years in 1932, according to the analysis by U-M researchers Jos A. Tapia Granados and Ana Diez Roux. The increase occurred for both men and women, and for whites and non-whites.

"The finding is strong and counterintuitive," said Tapia Granados, the lead author of the study and a researcher at the U-M Institute for Social Research (ISR). "Most people assume that periods of high unemployment are harmful to health."

For the study, researchers used historical life expectancy and mortality data to examine associations between economic growth and population health for 1920 to 1940. They found that while population health generally improved during the four years of the Great Depression and during recessions in 1921 and 1938, mortality increased and life expectancy declined during periods of strong economic expansion, such as 1923, 1926, 1929, and 1936-1937.

The researchers analyzed age-specific mortality rates and rates due to six causes of death that composed about two-thirds of total mortality in the 1930s: cardiovascular and renal diseases, cancer, influenza and pneumonia, tuberculosis, motor vehicle traffic injuries, and suicide. The association between improving health and economic slowdowns was true for all ages, and for every major cause of death except one: suicide.

Although the research did not include analyses of possible causes for the pattern, Tapia Granados and Diez Roux offer some possible explanations about why population health tends to improve during recessions but not expansions.

"Working conditions are very different during expansions and recessions," Tapia Granados said. "D
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Contact: Diane Swanbrow
swanbrow@umich.edu
734-647-9069
University of Michigan
Source:Eurekalert

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