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Genes play a bigger role in women's depression than in men's, twin study finds

idual environmental factors play a larger role in the development of male depression."

This result doesn't necessarily mean that men are more likely to become depressed after a stressful event than are women, Bierut says. "But when they do develop depression, it is more likely to be due to individual stressors than to genetic factors," she explains.

Surprisingly, the estimates of heritability were similar no matter which of the three definitions of depression was used. "People have thought that severe depression is genetic depression whereas mild depression is environmental," Bierut says. "We didn't find any evidence for that."

The researchers now are investigating the inheritability of alcoholism, which occurs in men more often than in women. Their long-term goal is to understand the relationship between alcoholism and depression.


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Contact: Linda Sage
314-286-0119
Washington University in St. Louis
26-Jul-1999


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