The prevalence worldwide is unknown due to the lack of standardised medical care and poor health care access in underdeveloped countries. In the US, an estimated 110,000 individuals are affected, but data suggest that prevalence is increasing.[7][8] Bronchiectasis is more common with advancing age, ranging from 4.2 per 100,000 people aged 18 to 34 years to 272 per 100,000 people over 75 years old.[7]

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