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Your friends friend can make you fat.

5 Aug

Think about your five closest friends, and their five closest friends.  How do their waistlines compare to your own?

I have recently finished reading Connected a book by the same researchers who authored this study, and published their findings in the New England Journal of Medicine.  Below is an excerpt :

“A person’s chances of becoming obese increased by 57% (95% confidence interval [CI], 6 to 123) if he or she had a friend who became obese in a given interval. Among pairs of adult siblings, if one sibling became obese, the chance that the other would become obese increased by 40% (95% CI, 21 to 60). If one spouse became obese, the likelihood that the other spouse would become obese increased by 37% (95% CI, 7 to 73). These effects were not seen among neighbors in the immediate geographic location. Persons of the same sex had relatively greater influence on each other than those of the opposite sex. The spread of smoking cessation did not account for the spread of obesity in the network.”

Read more about it :

The Spread of Obesity in a Large Social Network over 32 Years

Nicholas A. Christakis, M.D., Ph.D., M.P.H., and James H. Fowler, Ph.D.

http://www.contentnejmorg.zuom.info/cgi/content/full/357/4/370

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