Figure 3.
Age–standardised rates for two age groups. The possible split between de novo and secondary promoted GBMs is based on incidence change of Grades II and III diffuse and anaplastic astrocytoma.
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.