Asthma Management Handbook
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Figure. Lung function decline in smokers and non-smokers with or without asthma

a

b

Mean FEV1 corrected for baseline height, weight and age in (a) men and (b) women

People who do not have asthma and do not smoke
People with asthma who do not smoke
People who do not have asthma who smoke
People with asthma who smoke

Source

Reprinted with permission of the American Thoracic Society. Copyright © 2013 American Thoracic Society. 
James AL, Palmer LJ, Kicic E et al. Decline in lung function in the Busselton Health Study: the effects of asthma and cigarette smoking. Am J Respir Crit Care Med 2005; 171: 109-14. Available at: http://ajrccm.atsjournals.org/content/171/2/109.full
Official journal of the American Thoracic Society.

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