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. 2021 Nov 1;11:748061. doi: 10.3389/fonc.2021.748061

Figure 1.

Figure 1

Trends in Annual Glioma Incidence Rates. (A) represents glioma incidence (1975-2018), overall and by histologic type. (B) represents glioblastoma incidence (1975-2018) by age group. (C) represents glioblastoma incidence by tumor extension (1983-2015) and size (1983-2018). Each point represents the observed incidence rates (100,000 person-years). The slope of the lines represents the annual percent change (APC). All rates are age-adjusted to the 2000 US standard population.