Dangers of smoking for women :
Many doctors fear the dangers to public health from the extension of smoking women in developed countries. Data from the cohort of Nurses'Health Study, which followed 104 519 women from 1980 to 2004, seem to give them reason. That judging! The analysis of 12 483 deaths during the 24 year period of study showed that the overall mortality was increased more than 2.8 among women smokers in this series (28% of the workforce in 1980) compared to 46% of women non-smokers. In addition, 64% of deaths and 69% of vascular deaths were deemed related to smoking among smokers. The relative risk of disease, from coronary artery disease and cerebrovascular disease were increased respectively by 3.3, 3.9 and 2.8 in multivariate analysis among smokers. Nevertheless, increases risk largest were noted for COPD (relative risk over 39 among smokers) and lung cancer (relative risk over 21 among smokers). The impact of smoking cessation seems to be different for vascular diseases and respiratory diseases. For coronary disease and cerebrovascular disease, a favorable effect is observed rapidly after quitting smoking and, respectively, 61% and 42% of the reduced risk was observed during the first five years. However, the decline in risk was only 18% after 5 to 10 years of arrest to respiratory diseases and 21% to 5 years for lung cancer. The relationship between risk and the number of cigarettes consumed per day is less clear for the disease for respiratory diseases, which could be due, say the authors, because the harmful effects of smoking appear more quickly in the the first case.