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.
Forest Plot of Hazard Ratios and Related 95% Confidence Intervals of Hip Fracture for the Propensity-score Matched Cohorts of Patients with Noncancer Pain and Tramadol Initiation Comparing with Initiation of Codeine, Naproxen, Ibuprofen, Celecoxib, or Etoricoxib.
