What is the role of body mass index (BMI) in obstructive sleep apnea (OSA)?

Updated: Sep 15, 2020
  • Author: Himanshu Wickramasinghe, MD, MBBS; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Approximately 30% of patients with a BMI greater than 30 and 50% of those with a BMI greater than 40 have OSA. In the United States, 20% of men and 25% of women have a BMI greater than 30. Unfortunately, obesity has become an epidemic in industrialized nations. One study showed that the number of people with a BMI greater than 40 has tripled since 2000. [82] Patients with obesity hypoventilation syndrome and some patients with OSA may have evidence of pulmonary hypertension and right-side heart failure.

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