Use these data to calculate the crude influenza rate per


For this problem, note the following chart:

Age Group
(in years)

% of Population in Age Group

Influenza Rate per 1,000 person-years

 

CITY A

CITY B

CITY C

Massachusetts

CITY A

CITY B

CITY C

YOUNG

40%

50%

80%

60%

2

10

30

OLD

60%

50%

20%

40%

70

110

5

There are 10,000 individuals in City A, which is located in Massachusetts. Eight young individuals and 420 old individuals develop the flu over the course of a year.

  • Use these data to calculate the crude influenza rate per 1,000 individuals per years in City A.
  • What is the crude rate of influenza in City B?
  • What is the crude rate of influenza in City C?
  • Calculate an age-adjusted influenza rate for each of the cities. Use the age distribution for the State of Massachusetts (shown in the table) as the standard.

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Basic Statistics: Use these data to calculate the crude influenza rate per
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