Obesity hypoventilation syndrome epidemiology and demographics

The exact prevalence of OHS is unknown. In patients with a BMI over 35 who were admitted to hospital, 31% had elevated carbon dioxide levels. It is not known whether men or women are at greater risk. The presence of OHS is associated with an increased risk of death compared to those with obesity but no OHS (24% vs 9% over an 18 month period).

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