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U.S. teen smoking decreases

08-08-2011 16:06 BJT

BEIJING, Aug. 8 (Xinhuanet) -- American teenagers are becoming casual smokers, instead of heavy/regular ones, according to reports Monday quoting a study in the American Journal of Preventative Medicine.

Heavy smoking is defined by finishing more than 11 cigarettes per day, moderate between six and 10, and light between one and five.

Between 1991 and 2009, heavy smoking among teenagers had decreased by 10 percent, down to 8 percent, while casual smoking increased from 67 percent to 79 percent, said the study.

No significant changes in smoking trends for African American teenagers was observed during the period, but for Hispanic teenagers, the heavy smoking rate increased from 3.1 percent to 6.4 percent.

Though smoking has different risks, smokers all have an increased risk for heart disease, heart attack, lung cancer and other types of cancer.

An estimated 90 percent of all lung cancer in males are caused by smoking and an estimated 80 percent of all lung cancer in females are caused by smoking, the study added.

According to the Centers for Disease Control, smoking has contributed to an estimated 443,000 deaths annually in the U.S., nearly one of every five.

It causes more deaths than Human Immunodeficiency Virus (HIV), illegal drug use, alcohol use, motor vehicle injuries, suicides, and murders combined.

Editor:Wang Xiaomei |Source: Xinhua

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