Question

Exercise 1. In one city, there were 400 new cases diagnosed as diabetes in 1998. The number of population at the beginning of 1998 is 19500, and there are 20500 at the end of this year. there are 1000 patients with diabetes at the beginning of this year and 80 patients died from diabetes during this year. Please calculate the indexes as below: (1)incidence rate of diabetes in 1998 (2) death rate of diabetes in 1998 (3)fatality rate of diabetes in 1998 (4)prevalence rate of diabetes on January 1st, 1998 (5)period prevalence rate in 1998

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Answer 1

(1) incidence rate of diabetes in 1998 is 400 per 1000 people.

(2) death rate of diabetes in 1998 is 4 per 1000 people.

(3 fatality rate of diabetes in 1998 is 8%.

(4) prevalence rate of diabetes on January 1st, 1998 is 5.13%.

(5) period prevalence rate in 1998 is 5%.

Step-by-step explanation:

1) To calculate the incidence rate of diabetes in 1998, you can use the formula:

Incidence Rate = (Number of new cases / Population at risk) x 1000

In this case, the number of new cases is 400 and the population at risk is the increase in population, which is 20500 - 19500 = 1000.

Therefore, the incidence rate of diabetes in 1998 is (400 / 1000) x 1000

= 400 per 1000 people.

2) The death rate of diabetes in 1998 can be calculated using the formula:

Death Rate = (Number of deaths / Population at risk) x 1000

In this case, the number of deaths is 80 and the population at risk is the average population, which is (19500 + 20500) / 2 = 20000.

Therefore, the death rate of diabetes in 1998 is (80 / 20000) x 1000

= 4 per 1000 people.

3) The fatality rate of diabetes in 1998 can be calculated using the formula:

Fatality Rate = (Number of deaths from diabetes / Number of cases of diabetes) x 100

In this case, the number of deaths from diabetes is 80 and the number of cases of diabetes is the prevalence of diabetes at the beginning of the year, which is 1000.

Therefore, the fatality rate of diabetes in 1998 is (80 / 1000) x 100

= 8%.

4) The prevalence rate of diabetes on January 1st, 1998 can be calculated using the formula:

Prevalence Rate = (Number of cases of diabetes / Population at risk) x 100

In this case, the number of cases of diabetes is 1000 and the population at risk is the population at the beginning of the year, which is 19500.

Therefore, the prevalence rate of diabetes on January 1st, 1998 is (1000 / 19500) x 100

= 5.13%.

5) The period prevalence rate in 1998 can be calculated using the formula:

Period Prevalence Rate = (Number of cases of diabetes during the year / Average population) x 100

In this case, the number of cases of diabetes during the year is the prevalence of diabetes at the end of the year minus the prevalence of diabetes at the beginning of the year, which is (20500 - 19500) - 1000

= 1000.

The average population is the average of the population at the beginning and end of the year, which is (19500 + 20500) / 2 = 20000.

Therefore, the period prevalence rate in 1998 is (1000 / 20000) x 100

= 5%.