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Pulmonology & Critical Care
US survey finds higher COPD prevalence in nonmetropolitan versus metropolitan areas
Why is COPD twice as common in rural America compared to cities?
A 2019 US observational survey of adults aged ≥18 years found the percentage with diagnosed COPD was higher in nonmetropolitan (8%) than met…
In 2019, adults living in nonmetropolitan areas were twice as likely to have diagnosed COPD compared to those in metropolitan areas.
CDC
Apr 4, 2026
Pulmonology & Critical Care
U.S. COPD prevalence patterns similar across smoking status groups in 2017 observational data
Study finds similar geographic patterns for COPD across different smoking groups
A 2017 U.S. observational study found geographic and sociodemographic patterns of COPD prevalence were similar among current smokers, former…
COPD rates follow the same geographic patterns across current, former, and never-smokers in the United States, showing similar distribution …
CDC
Apr 4, 2026
Pulmonology & Critical Care
Observational report examines COPD prevalence in US adults aged 18 years and older
Study examines how common COPD is among U.S. adults aged 18 and older
An observational report describes the prevalence of chronic obstructive pulmonary disease among adults aged ≥18 years in the United States.
A new report on COPD prevalence in U.S. adults lacks key data, so it doesn't reveal how common the lung disease is.
CDC
Apr 3, 2026
Pulmonology & Critical Care
RCT
Vitamin D3 supplementation improved exercise tolerance in deficient male COPD patients in small RCT
Vitamin D supplements linked to better walking ability in men with COPD and low vitamin D
A 26-week double-blind RCT in 40 vitamin D3-deficient male COPD patients found that oral vitamin D3 supplementation (80,000 IU/week then adj…
Men with COPD and low vitamin D levels walked farther and felt less breathless after taking supplements for six months.
Apr 2, 2026