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.
Changes of lung function test between groups over a year. a FEV1/FVC at the first visit (V1) and final visit (12 months later) (V2) for lower FEF50% group and normal FEF50% group. b FEV1% at the first visit (V1) and final visit (12 months later) (V2) for lower FEF50% group and normal FEF50% group. c FEF50% at the first visit (V1) and final visit (12 months later) (V2) for lower FEF50% group and normal FEF50% group. p < 0.05: statistically significant
