PUB210 Concepts Of Epidemiology - Assessment Task 2

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Question 5

A case-control study examined the relationship between consumption and oily fish high in omega-3 fatty acids (e.g. sardines) and coronary heart disease.

  Coronary heart disease
Weekly oily fish consumption Yes No
< 1 meal 125 175
≤ 1 meal 75 225

 

a. Calculate the odds that: (2 marks)

  1. A person with coronary heart disease had consumed &lt; 1 oily fish meal per week?
  2. A person without coronary heart disease had consumed &lt; 1 oily fish meal per week?

b. Calculate the odds ratio (OR) for the association between exposure to &lt; 1 oily fish meal per week and the outcome of coronary heart disease (1 mark)
c. What does the OR mean? Report your conclusion (2 marks)

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