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.
(A) Forest plot showing the relationship between preoperative activity nonambulatory status and incidence of venous thromboembolism (VTE) after spine surgery. (B) Forest plot showing the relationship between high level of serum D-dimer and incidence of VTE after spine surgery. CI = confidence interval, OR = odds ratio, SMD = standardized mean difference.
