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Brain cancer is the growth of abnormal cells in the brain and central nervous system including the spinal cord, meninges, and cranial nerves. Little is known about the causes of cancers of the brain and other parts of the central nervous system. Several studies of environmental risk factors have presented inconsistent and inconclusive results. Read more about brain and central nervous system cancers.
Back to topAnnual Brain and Nervous System Cancer Incidence Data
Annual cancer incidence measures can be used to identify trends and patterns of cancer incidence over time. Annual measures are only available at the state level. County-level cancer incidence measures are available as five-year aggregate data.
Measure Description:
- The Cancer Count is the number of newly diagnosed malignant cancers.
- The Crude Rate (Per 100K) is the rate of newly diagnosed malignant cancers per 100,000 population
- The Age Adjusted Rate (Per 100K) is the age adjusted rate of newly diagnosed malignant cancers per 100,000 population. Age adjustment to the 2000 Standard US Census is done to allow direct comparison of rates in counties and state with different population age distributions.
Five Year Brain and Nervous System Cancer Incidence Data
Five Year incidence measures can be used to identify trends and patterns of cancer incidence over time and in different geographic areas. Five-year aggregate measures are available at the state and county level. Five-year aggregate data is used to reduce the presence of suppressed values due to small numbers; allowing the display of data, and stabilization of rates to better evaluate trends. Even with this aggregation some values still need to be suppressed.
Measure Description:
- The Average Annual Count is the average number of newly diagnosed malignant cancers per year in the five-year period.
- The Crude Rate (Per 100K) is the rate of newly diagnosed malignant cancers per 100,000 Population during the five-year period.
- The Age Adjusted Rate (Per 100K) is the age-adjusted rate of newly diagnosed malignant cancers per 100,000 Population during the five-year period. Age adjustment to the 2000 Standard US Census is done to allow direct comparison of rates in counties and state with different population age distributions.