Question

In: Statistics and Probability

In 2019, the University of Alabama (UA) homecoming event took place in Tuscaloosa from July 21...

In 2019, the University of Alabama (UA) homecoming event took place in Tuscaloosa from July 21 until July 24, 2019. People at the event included UA Alumni, their families, and friends who did not attend UA. Between August 3 and August 15, some of those who had been present at the event became ill with a type of pneumonia. No one attending the event had the disease before July 21, 2019. The number of UA alumni and non-Alumni who acquired the illness between August 3 and August 15, 2019, is shown in the table below.

Had pneumonia
Yes   No
Non-UA Alumni   50   750
UA Alumni 300   900

1) Compute the cumulative incidence of pneumonia among UA Alumni

Interpret the result

2) Compute the cumulative incidence of pneumonia among Non- Alumni

Interpret the result

3) Calculate the cumulative incidence ratio of pneumonia among UA Alumni compared to Non- Alumni

Interpret the result

4) Calculate the cumulative incidence difference of pneumonia among UA Alumni compared to Non- Alumni. (2pts)

Interpret the result

Solutions

Expert Solution

(1)

The cumulative incidence of pneumonia among UA Alumni =

= = 0.25

Interpretation: 25% of pneumonia in the period of Aug 3 to Aug 15 among UA alumni.

(2)

The cumulative incidence of pneumonia among Non - Alumni =

= = 0.0625

Interpretation: 6.25% of pneumonia in the period of Aug 3 to Aug 15 among Non-alumni.

(3)

Cumulative incidence ratio of pneumonia among UA Alumni compared to Non- Alumni =

= 4

Interpretation: Here the person who belongs to UA alumni has 4 times the risk of affecting pneumonia as compared to the person who belongs to Non alumni.

(4)

Cumulative incidence difference of pneumonia among UA Alumni compared to Non- Alumni

= CI among UA alumini - CI among Non Alumni = 0.25 - 0.0625 = 0.1875

Interpretation: There were 1875 cases with pneumonia out of 10000 among UA Alumni as compared to Non-Alumni

orchestra answered 1 year ago

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