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| S P E C I A L | Tobacco Under Attack |
Study links cancer risk to passive smoke
September 9, 1997
Web posted at: 6:40 p.m. EDT (2240 GMT)LAS VEGAS (CNN) -- Scientists at the University of Minnesota said Tuesday they may have found the first direct evidence linking passive smoke and cancer in a real-life setting.
In a study of nine non-smokers who work with smokers, the researchers discovered what is believed to be a cancer-causing substance in the urine of the non-smokers. The substance, which is called NNK, is a byproduct of nicotine.
Previous studies have established a link between passive smoke and health problems, such as, lung cancer, asthma and heart disease.
Dr. Stephen Hecht, author of the Minnesota study, said further research on NNK in non-smokers is needed; his study is too small to be considered conclusive. It included only nine people, and it only followed them for one day.
The study is being released at the American Chemical Society meeting in Las Vegas.
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