Standard Population by Age and
Age-Specific Death Rates
| Age (years) |
Standard population
|
Death rate in A (per
1,000) |
Expected deaths at A's
rates |
Death rate in B (per
1,000) |
Expected deaths at B's
rates |
| Under 1 |
6,000 |
15.0 |
90 |
20.0 |
120.0 |
| 1-14 |
23,000 |
1.0 |
23 |
0.5 |
11.5 |
| 15-34 |
41,000 |
1.0 |
41 |
1.0 |
41.0 |
| 35-54 |
30,000 |
4.0 |
120 |
5.0 |
150.0 |
| 55-64 |
15,000 |
15.0 |
225 |
20.0 |
300.0 |
| Over 64 |
35,000 |
80.0 |
2,800 |
90.0 |
3,150 |
| Total |
150,000 |
35,6 |
3,299 |
17.4 |
3,772.5 |
| Age-adjusted death rate (per
1,000) |
|
22.0 |
|
25.0 |
|
|
Direct adjustment of rates requires the use of a standard population.
In this example, the standard is based on the combination of
communities A and B. As illustrated, the age-specific rates for
population A are applied to the standard to determine the number
of expected deaths for that population. This analysis is also
performed for population B to determine the expected number
of deaths for that community. The age-adjusted rates are determined
and based on the expected number of deaths relative to the standard
population. In this example, the adjusted rates are quite similar,
indicating that the difference in crude rates was, in fact, due to
population variation in age.
|
