COPD Stages
There are four stages of COPD which are defined by the amount or volume of air a person breathes out in the first second of forced exhalation.
In Stage I, COPD is considered mild and a person may not be aware that lung function is beginning to decline.
In Stage II, considered moderate, you may notice shortness of breath during/after physical exertion as symptoms outlined above progress.
In Stage III, considered severe COPD, exacerbations are common and shortness of breath continues to worsen. Exacerbations are flare-ups characterized by tightness in the chest and extreme shortness of breath; in some cases it may be necessary to use a bronchodilator inhaler or other fast-acting treatment.
In Stage IV, considered extremely severe, exacerbations may be life-threatening and your quality of life may suffer greatly.
A 2017 study from the New England Journal of Medicine stresses the importance of early treatment of COPD. This research found that, over time, those living with even stage 1 COPD who were treated early had better outcomes than those who delayed treatment.