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 standardized mean difference (SMD) for the effect of deep brain stimulation on cognitive outcomes in different subgroups (target) in patients with Alzheimer's disease. The green square shows the overall pooled effect. Red squares show pooled effects in each subgroup. Black squares indicate the SMD in each study. Horizontal lines represent a 95% confidence interval (CI).
