Twenty years of changes in the disease assessment method of the Global Initiative for Chronic Obstructive Lung Disease

The Global Initiative for Chronic Obstructive Lung Disease(GOLD)has been changing for nearly 20 years.GOLD has moved from single assessment using spirometry to a more comprehensive assessment of chronic obstructive pulmonary disease using spirometry,symptoms and exacerbation history.And subsequently,a new assessment system for chronic obstructive pulmonary disease separated spirometric grades from the old assessment system,and classified patients only according to their symptoms and history of exacerbation.The distribution,clinical characteristics,treatment,and prognosis of the new subgroups were different from the old ones.In this review,we will present a brief profile of changes made to the disease assessment method of GOLD,based on the relevant existing literature.