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.
Geographic distribution showing the pooled prevalences of (A) poor sleep. quality and (B) insomnia across WHO regions. The numbers in the orange circles indicate the number of studies from respective countries. The size of the orange circles is proportional to the number of studies. Abbreviation: WHO, World Health Organization.
