## Step 1: Calculating Age-adjusted Rates

In this example we are calculating age-adjusted incidence rates (age-adjusted to the 2000 US Standard Population (Census P25-1130)) for all malignant cancers. These rates are calculated for black females diagnosed from 2000-2004 in the SEER 9 registries.

To calculate the rates, we begin with counts: the number of tumors for each of the 19 age groups for the same geographic, race, sex, cancer site combination. That is, these are the number of malignant incident cases for black females in the SEER 9 registries from 2000-2004. (Note: these values were calculated using the SEER 9 registry database from the Nov 2006 submission.)

Age Count
00 years
29
01-04 years
87
05-09 years
67
10-14 years
71
15-19 years
87
20-24 years
177
25-29 years
290
30-34 years
657
35-39 years
1,072
40-44 years
1,691
45-49 years
2,428
50-54 years
2,931
55-59 years
2,881
60-64 years
2,817
65-69 years
2,817
70-74 years
2,744
75-79 years
2,634
80-84 years
1,884
85+ years
1,705