Figure 1.
Global Initiative for Chronic Obstructive Lung Disease (GOLD) category by treatment level by (a) modified Medical Research Council Dyspnoea Scale and (b) COPD Assessment Test (CAT).
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.