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.
Lost to follow-up values represent the total number of participants lost to follow-up at each time point in each group and are not summative values. Some participants may have missed an early follow-up but still kept a later one. LBP indicates lower back pain; PT, physiotherapy.
