Next we use population data with the counts to calculate crude rates for each of the 19 and 20 age groups. The populations must be for the same geographic area, sex, race, and years (the sum of the black female populations for 2018-2022 in the SEER 21 registries).

In this step, we are calculating the crude, age-specific rates. A crude incidence rate is the number of new cancers of a specific cancer site or type occurring in a specified population during a year, usually expressed as the number of cancers per 100,000 population at risk. It is calculated using the following formula:

c r u d e r a t e = c o u n t p o p u l a t i o n × 100 , 000

Age Count Population Crude Rate
00 years 0 600,100.000 0.000
01-04 years 0 2,448,220.000 0.000
05-09 years 0 3,154,386.000 0.000
10-14 years 0 3,333,214.000 0.000
15-19 years 4 3,293,630.000 0.121
20-24 years 87 3,409,133.000 2.552
25-29 years 542 3,788,166.000 14.308
30-34 years 1,359 3,638,814.000 37.347
35-39 years 2,454 3,339,743.000 73.479
40-44 years 4,305 3,133,986.000 137.365
45-49 years 5,751 3,029,696.000 189.821
50-54 years 7,249 3,069,753.000 236.143
55-59 years 8,900 3,133,644.000 284.014
60-64 years 9,716 2,845,989.000 341.393
65-69 years 9,524 2,275,834.000 418.484
70-74 years 7,655 1,694,314.000 451.805
75-79 years 5,036 1,110,105.000 453.651
80-84 years 3,233 730,514.000 442.565
85+ years 2,610 715,408 364.827
    85-89 years 1,707 420,278 406.160
    90+ years 903 295,130 305.967

Note: these values were calculated using the SEER 21 registry limited-field database from the Nov 2024 submission.

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