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.
Estimated differences of NRS scores between S-ketamine and morphine treatments, their 95% CIs, and the prespecified noninferiority margin (dashed line).
Abbreviations: PCA, patient-controlled analgesia; CIs, confidence intervals; NRS, numeric rating scale.
