Fig. 4.
Correlation of spirometry measurements and (r/R)2 at FRC with age (all P < 0.05). The lines are univariate linear fits with 95% confidence intervals (shaded). FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.
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.