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This is Scientific American 60-Second Mind, I'm Christie Nicholson. Got a minute?

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Peers can have a big influence on a person's behavior, especially in adolescence.

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And one choice of peers during those crucial years makes a profound difference later in life: and that is becoming a member of a gang.

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Researchers assembled a cohort of more than 800 fifth-graders and then followed them for the next 23 years.

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The research team ultimately identified 173 individuals from the starting group who wound up in gangs,

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and then matched them with another 173 non-gang-members as a control.

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Both groups of kids had similar habits, including comparable drug and alcohol use.

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They lived in similar environments and socioeconomic conditions, and did as well academically.

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By the time they'd reached the ages of 27 to 33, the ones who'd spent time in gangs were three times more likely to have committed a crime and had double the incarceration rates as did those who avoided gang life.

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The ex-gang members also ran a three-fold risk of substance addiction, were twice as likely to say they were in poor health and had a 50 percent drop in high school graduation.

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The study is in the American Journal of Public Health.

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The researchers say that preventing kids from joining gangs thus appears to have numerous beneficial outcomes,

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including better physical and mental health as adults.

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Thanks for the minute, for Scientific American 60-Second Mind. I'm Christie Nicholson.

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