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.
Log-rank analysis of the duration of analgesia. The median duration of analgesia was 15 (95% CI, 12.9–17.1) days for the BTA group, and 69 (95% CI, 45.5–92.5) days for the BTB group. There was a significant difference in the duration of analgesia between the two groups (P = 0.002).
