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Eventually everyday activities, such as walking or getting dressed, become difficult. The term “chronic bronchitis” is still used to define a productive cough that is present for at least three months each year for two years. This includes decreasing rates of smoking and improving indoor and outdoor air quality. While treatment can slow worsening, no cure is known. As of 2015, COPD affected about 174. It typically occurs in people over the age of 40. Males and females are affected equally commonly.
In 2015, it resulted in 3. 2 million deaths, up from 2. 4 million deaths in 1990. The number of deaths is projected to increase further because of higher smoking rates in the developing world, and an aging population in many countries. The sound of wheezing as heard with a stethoscope. If different types of COPD exist is unclear. While previously divided into emphysema and chronic bronchitis, emphysema is only a description of lung changes rather than a disease itself, and chronic bronchitis is simply a descriptor of symptoms that may or may not occur with COPD.
A chronic cough is often the first symptom to develop. This condition can occur before COPD fully develops. The amount of sputum produced can change over hours to days. In some cases, the cough may not be present or may only occur occasionally and may not be productive.