Smoking: Can We Really Make a Difference
The Food & Drug Administration, which now regulates tobacco, is concerned that the industry is trying to lure young people to tobacco products
The use of pack-years to assess the risk of developing COPD or some other lung diseases has been criticized for being a measure based on the assumption that both smoking intensity and duration are of equal importance.11,16,26 However, some authors argue that it should continue to be used because of its simplicity and because it is a measure that provides information on the cumulative amount of tobacco consumption.9,16,27,28 In this study, COPD risk increases linearly with the increase in pack/years, an aspect that also occurs in the nonparametric model
When should I stop using DIY methods and use a professional cleaner
1991 Science 253 : 4953 Husgafvel-Pursiainen K, Kannio A