The smoking prevalence in Europe varies from 14% in Sweden to nearly 38% in Greece.1 In the USA it is now approximately 20%, with large differences between states and according to social class and ethnic background.2 The proportions of men and women smoking is rather variable, but the relative risk of cardiovascular diseases seems to be higher in women.3 Smoking prevalence decreases with higher educational level and higher family income. Smoking is a major risk factor for lung, cardiovascular and other diseases.4 5 Smokers double their risk of having a heart attack compared with non-smokers4 and many people die from diseases related to smoking.
The effects of nicotine, like those of other drugs with the potential for abuse and dependence, are centrally mediated. The impact of nicotine on the central nervous system is neuroregulatory in nature, affecting...
Source: http://pmj.bmj.com/cgi/content/short/88/1045/617?rss=1
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