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does the amount of cigarettes you smoke matter Pack-years is a way to measure a smoker's exposure to tobacco. Higher exposure means higher risk for lung cancer. beaumont.org/lung does it matter how many
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This survey was completed during July and August in 2015 The results of the survey 79% of smokers in this survey from Iraq, 6% from Egypt, 5% from Syria, 3% from Tunisia, 1% from Oman, 1% from Bahrain, 1% from KSA, 1% from France, 1% from Spain as shown Figure 5
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66 people were not randomised either because they did not complete the survey or because we had reached the quota for a mental health status group
