Question

During the calendar year of 1971 a total of 171 deaths were caused by influenza in a city of 450,000 persons. The temporal distribution of these deaths was as follows: First Quarter, 54; Second Quarter, 43; Third Quarter, 35; and Fourth Quarter, 39. Calculate the annual and quarterly mortality rates per 100,000 population.

Answer 1

Answer and Step-by-step explanation:

The computation of annual and quarterly mortality rates per 100,000 population is shown below:-

Quarterly mortality rates are

$= \frac{Deaths}{Population\ in\ the\ city}\times Population$

For the first quarter

$= \frac{54}{450,000}\times 100,000$

= 12  death per 100,000 population

For the second quarter

$= \frac{43}{450,000}\times 100,000$

= 9.5  death per 100,000 population

For the third quarter

$= \frac{35}{450,000}\times 100,000$

= 7.7  death per 100,000 population

For the fourth quarter

$= \frac{39}{450,000}\times 100,000$

= 8.6  death per 100,000 population

Now the annual mortality is

$= \frac{Deaths}{Population\ in\ the\ city}\times Population$

$= \frac{171}{450,000}\times 100,000$

= 38 death per 100,000 population