Fig. 2.
Flow chart of the patients included in the study. The patient exclusion was conducted if the patient died before the operation, or a patient undertook anesthesia other than general, thereby, not providing the LOS outcome variable
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.