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.
Spline curves illustrating changes in patient compliance to home oxygen therapy over time: (a) prescription of oxygen for 24 hours/day in 16 patients and (b) prescription of oxygen for ≥18 hours/day in 84 patients. Dashed line: prescription; shaded area: 95% confidence interval.
