emphysema prevention :: Article Creator Chronic Bronchitis Vs. Emphysema: What's The Difference? In 2021, an estimated 14 million adults in the United States reported a diagnosis of chronic obstructive pulmonary disease (COPD), chronic bronchitis, or emphysema. [1] If you're not sure what the difference is between the three conditions, that's understandable — you may hear them used interchangeably, although they aren't the same thing. "Both chronic bronchitis and emphysema fall under the more general term COPD," explains David A. Beuther, MD, a pulmonologist at National Jewish Health in Denver. COPD is caused by damage to the airways or other parts of the lung, making it progressively more difficult to breathe. "Oftentimes, most patients have both emphysema and chronic bronchitis, which is why we often just refer to it as COPD," Dr. Beuther adds. About 3 out of 4 cases of COPD are caused by smoking. [2] And...