Under such conditions, the population will eventually stabilize into a stationary population, with no year-to-year changes in age-specific rates or in total population.

Direct standardization is able to be used when the population being studied is large enough for age-specific rate is stable.

Cancer incidence in the United States (SEER) age-specific rates.

For age-specific mortality rates, see age-specific rates.

It is obtained by summing the single-year age-specific rates at a given time.

We must therefore consider the rates associated with different age groups - age-specific rates.

This is simply the unweighted sum of the age-specific rates.

"Age patterns of mortality for older women: an analysis using age-specific rate of mortality change with age."