Study: American Cigarettes Deadlier than Ever

Dr David Burns of the University of California has done some extensive research on cancer trends among cigarette smokers.  His conclusion: changes in cigarette designs (lower tar, etc) are most likely responsible for an increase in certain kinds of cancer:

Smokers once tended to get lung cancer in larger air tubes, particularly a type named "squamous cell carcinoma." Then doctors noticed a jump in adenocarcinoma, which grows in small air sacs far deeper in the lung. Initial studies blamed introduction of filtered, lower-tar cigarettes. When smokers switched, they began inhaling more deeply to get their nicotine jolt, pushing cancer-causing smoke deeper than before.

Burns' study, presented at a meeting of the Society for Research on Nicotine and Tobacco, took a closer look. He compared smoking behaviors of different age groups over four decades — how much they smoked, when they started, when they quit — and how cancer-risk changed.

The risk of squamous cell carcinoma stayed about the same over those years, Burns found. But adenocarcinoma rose. It makes up 65 percent to 70 percent of newly occurring U.S. lung cancer cases, but no more than 40 percent of Australia's lung cancer, he said.

While the nation's total lung cancer cases have inched down as the number of smokers has dropped in recent years, the study suggests an individual smoker's risk of getting cancer is higher.

You can read the whole news article HERE.

Just one more reason to quit!