Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The distribution of chronic obstructive pulmonary disease severity by Staging of Airflow obstruction by Ratio (STAR) and Global Initiative for Chronic Obstructive Lung Disease (GOLD) criteria in two new studies. N = total number of participants and number affected by chronic obstructive pulmonary disease. Percent is the percentage of the total study population in that grade. Figures in red refer to the percentage of individuals at grading reclassified to STAR 1.
