One-third of US teens text while driving

A new federal study shows dramatic improvement in the driving habits of US high school students, but texting by teenagers behind the wheel is a concern, the Centers for Disease Control and Prevention said.

One in three high school students reported they had texted or e-mailed while driving during the previous 30 days, according to the centres' 2011 Youth Risk Behavior Survey of 15,000 high school students.

The percentage of youths who texted or e-mailed while driving was higher for upper classmen, with nearly 43% of 11th graders and 58% of 12th graders saying they had done so in the past month. This is the first time texting questions were included in this survey.

"Texting or e-mailing while driving a car can have deadly consequences," said Howell Wechsler, director of the CDC's Division of Adolescent and School Health.

Car accidents the leading cause of teen deaths

The CDC did not have statistics on how many teens are killed annually from accidents caused by texting or e-mailing.

In 2010, auto accidents killed 3,115 teens aged 13-19, the CDC said. That was down 44% over the past decade, but auto accidents remain the leading cause of teen deaths.

The centres said the survey revealed more teenagers are wearing seatbelts and fewer are driving after drinking.

Over two decades, the percentage of high school students who never or rarely wore a seatbelt declined from 26% to 8%, the CDC said.

In 2011, only 8% of students said they had driven a car within the past 30 days when they had been drinking alcohol, compared to 17% in 1997. The percentage of students who rode with a driver who had been drinking during the previous 30 days dropped from 40% to 24%.

"These trends show that we are making great progress," Wechsler said.

The risk behaviour survey found that while cigarette smoking dropped slightly from 2009-2011, more teens smoked marijuana, with 23% of students saying they had used it one or more times during the previous 30 days. For the first time since the CDC began taking the survey in 1991, more teens said they smoked marijuana than cigarettes.

Nearly 40% of students said they had at least one alcoholic drink in the previous 30 days.

The risk survey also found that one in five students said they had been bullied on school property during the previous 12 months. About 16% said they had been bullied electronically through email, chat rooms, instant messaging, websites or texting.

More information about the CDC's Youth Behavior Risk Survey 2011 is available online at http://www.cdc.gov/Features/YRBS/

(Reuters Health, June 2012)

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