Social Networks and Kicking Bad Habits - Quitting Smoking Can Be Contagious

Original Source: Reuters

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The same team of experts who found that obesity may be socially contagious said they found similar patterns among smokers, with people clearly influencing others in their social and family networks. In fact, the most isolated people are now those who remain the most addicted as their personal networks get pushed to the fringes, they wrote in the New England Journal of Medicine.

Dr. Nicholas Christakis of Harvard Medical School in Boston and Dr. James Fowler of the University of California, San Diego, studied 12,067 people who have been taking part in the Framingham study -- a study of the health and habits of nearly an entire town in Massachusetts -- for the past 32 years. "We've found that when you analyze large social networks, entire pockets of people who might not know each other all quit smoking at once," Christakis said in a statement. "What appears to happen is that people quit in droves."

Smoking is becoming increasingly less common in the United States. In 1965, 42 percent of the population smoked, according to the U.S. Centers for Disease Control and Prevention. That number has fallen to around 20 percent. When the Framingham study started, around 37 percent of adults smoked. Spouses had strong effects -- when someone quit, his or her spouse was 67 percent less likely to continue smoking. Quitters influenced their brothers or sisters -- siblings were 25 percent less likely to smoke if one of them quit, while the friend of someone who kicked the habit was 36 percent less likely to smoke. Even co-workers are influential -- in small firms, a quitter could decrease smoking among peers by 34 percent.

Richard Suzman, who directs behavioral studies at the National Institute of Aging, said the research could influence policy. "The results suggest new and probably more powerful approaches to changing health behaviors, such as smoking, by careful targeting of small peer groups as well as single individuals," he said.

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