Kids get hooked on nicotine very quickly and at very low levels of exposureAugust 27, 2002Kids get hooked on nicotine with amazing speed and at levels of tobacco that are so low that nobody had even considered it possible, say researchers in Tobacco Control. To determine how long it takes for kids to get hooked, Joseph DiFranza and colleagues followed 679 seventh grade students (aged 12-13 years) over a period of 30 months. The students were interviewed in great detail eight times over the course of the study. Among 332 students who had ever tried tobacco, even just a puff, 40% reported symptoms of addiction. Among 237 students who had inhaled, 53% reported symptoms. For teenage girls who got hooked, it only took an average of 3 weeks from when they started to smoke occasionally. Among the boys, half were hooked within 6 months of the start of occasional smoking. "Some of these kids were hooked within a few days of starting to smoke," says Dr DiFranza. Perhaps even more surprising than the speed with which symptoms of addiction appeared was the very small amount of tobacco required, add the authors. Until now, scientists have always assumed that addiction does not begin until youths are smoking at least ten cigarettes per day, but this study shows that just the opposite is true. Youths who showed signs of being hooked were smoking an average of only two cigarettes per week, and in two thirds of youths, addiction appeared prior to daily smoking, suggesting that addiction comes before tolerance to nicotine. The authors coin a new term, "juvenile onset nicotine dependence" to emphasise that children are different from adults when it comes to the effects of nicotine. Because the adolscent brain is still developing, adolescents may be more vulnerable to addiction than adults. The impact of nicotine on the brain is also stronger and longer lasting on adolescents, they suggest. "Data from human and animal studies leads me to suspect that addiction to nicotine begins, in many cases, with the first cigarette," concludes Dr DiFranza. British Medical Journal (BMJ) |
|||||||||||||||||||||
| Related Smoking Current Events and Smoking News Articles Women Can Quit Smoking and Control Weight Gain Many women don't quit smoking because they are afraid of gaining weight. That's because nicotine suppresses the appetite and boosts a smoker's metabolism. Cigarettes Harbor Many Bacteria Harmful to Human Health Cigarettes are "widely contaminated" with bacteria, including some known to cause disease in people, concludes a new international study conducted by a University of Maryland environmental health researcher and microbial ecologists at the Ecole Centrale de Lyon in France. Study raises concerns about outdoor second-hand smoke Indoor smoking bans have forced smokers at bars and restaurants onto outdoor patios, but a new University of Georgia study in collaboration with the Centers for Disease Control and Prevention suggests that these outdoor smoking areas might be creating a new health hazard. Early end to key study on benefits of niacin, a B vitamin, in keeping arteries open was premature Heart experts at Johns Hopkins are calling premature the early halt of a study by researchers at Walter Reed Army Medical Center and Washington Hospital Center on the benefits of combining extended-release niacin, a B vitamin, with cholesterol-lowering statin medications to prevent blood vessel narrowing. Athletes on performance enhancers more likely to abuse alcohol, other drugs College athletes who use performance-enhancing substances may be at heightened risk of misusing alcohol and using recreational drugs as well, according to new research in the Journal of Studies on Alcohol and Drugs. 90 percent of Africans are not protected by smoke-free laws As African nations are poised to undergo the highest increase in the rate of tobacco use among developing countries, nearly 90 percent of people on the continent remain without meaningful protection from secondhand smoke, according to a new report released at a regional cancer conference today. Workplace BPA exposure increases risk of male sexual dysfunction High levels of workplace exposure to Bisphenol-A may increase the risk of reduced sexual function in men, according to a Kaiser Permanente study appearing in the journal Human Reproduction, published by Oxford Journals. Exposure to several common infections over time may be associated with risk of stroke Cumulative exposure to five common infection-causing pathogens may be associated with an increased risk of stroke, according to a report posted online today that will appear in the January 2010 print issue of Archives of Neurology, one of the JAMA/Archives journals. Carnegie Mellon researchers link health-care debate to risk of dying in US and Europe The current health care debate in the United States is complicated. Trade-offs between heath care expenditures, lifestyle choices and life expectancy have been suggested but seldom clearly demonstrated. Developmental delay could stem from nicotinic receptor deletion The loss of a gene through deletion of genetic material on chromosome 15 is associated with significant abnormalities in learning and behavior, said a consortium of researchers led by Baylor College of Medicine (www.bcm.edu) in a report that appears online today in the journal Nature Genetics. More Smoking Current Events and Smoking News Articles |
|||||||||||||||||||||
|
|||||||||||||||||||||
|
|||||||||||||||||||||