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Epidemiology: Mortality and Population Growth

Unless stated otherwise, express all final answers for this problem per 1,000. Based on the data in Table 1:

1) Calculate the crude mortality rate.

2) Calculate the crude birth rate.

3) If there is no immigration or emigration (migration in or out), is this population growing or shrinking?

4) Calculate the cause-specific mortality rate for heart disease.

5) Calculate the cause-specific mortality rate from cancer.

6) Calculate the infant mortality rate.

7) Calculate the proportionate mortality from heart disease. Express this as a percentage.

8) Calculate the proportionate mortality from cancer. Express this as a percentage.

9) Calculate the proportionate mortality from all other causes, except heart disease and cancer. Express this as a percentage.

10) If the proportionate mortality from heart disease were to go up, and the proportionate mortality from cancer stayed the same, what would happen to the proportionate mortality from all other causes?

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Table 1: Vital Statistics Data for an Imaginary Town

Category Number of People
Total Population (at mid-year) 250,000
Number of Infants Born Alive 3,501
Total Deaths from All Causes 7,502
Deaths among all infants < 1 year old 62
Deaths from heart disease 1,984
Deaths from cancer 1,545

Solution Preview

1) Calculate the crude mortality rate.

The crude mortality rate per 1000 people is calculated as:
mortality rate = (deaths during the given time period / total population size) x 1000

In this case, the crude morality rate is:

mortality rate = (7502 / 250000) x 1000 = 0.030008 x 1000 = 30.008

2) Calculate the crude birth rate.

Do the same thing, only use the number of births instead of the number of deaths.

birth rate = (3501 / 250000) x 1000 = 0.014004 x 1000 = 14.004

3) If there is no immigration or emigration (migration in or out), is this population growing or shrinking?

Because the mortality rate is greater ...

Solution Summary

The expert examines mortality and population growth in epidemiology. Crude birth rates are analyzed.

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