What is the relationship between obesity and asthma?

Updated: Nov 20, 2020
  • Author: Michael J Morris, MD, FACP, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Information from prospective cohort studies and population-based studies in the past several years suggests an association between asthma and obesity. Patients with an elevated body mass index have an increased risk for developing asthma. A prospective cohort study of almost 86,000 adult women in the Nurses' Health Study II observed for 5 years showed a linear relationship between body mass index and the risk of developing asthma. [10] The 2019 GINA guideline adds that obese patients with asthma have lower lung function and more comorbidities than asthma patients who are of normal weight. [106] Asthma is more difficult to control in obese patients, but weight loss of 5-10% can improve asthma control and quality of life. [107]

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