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.
Proportions of patients within each STarT Back Tool subgroup who had a poor clinical outcome on activity limitation (Poor clinical outcome defined as a Roland Morris disability questionnaire score >30) at 3 months and their relative risk. Asterisk the low-risk STarT Back Tool subgroup is the reference category
