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.
Opioid-medication prevalence (%) by follow-up interval for study subjects with opioid history (n=98).
Note: Sample sizes in this subgroup were 98 (prestudy, baseline), 90 (week 6), 87 (month 3), 87 (month 6), 84 (month 12), 74 (month 18), 79 (month 24), 66 (month 36), 54 (month 48), and 55 (month 60).
