How does smoking affect the risk of developing emphysema?

Updated: Mar 13, 2019
  • Author: Ali Nawaz Khan, MBBS, FRCS, FRCP, FRCR; Chief Editor: Eugene C Lin, MD  more...
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Using low-dose CT scans of 62,124 current, former, and never smokers, emphysema was identified in 28.5% (6,684) of current smokers, 20.6% (5,422) of former smokers, and 1.6% (194) of never smokers. The prevalence of lung cancer in current smokers was 1.1% for those without emphysema and 2.3% for those with emphysema; in former smokers, 0.9% for those without emphysema and 1.8% for those with emphysema; and in never smokers, 0.4% for those without emphysema and 2.6% for those with emphysema. [43]

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