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Module 4: Relative Risk & Odds Ratio Actual Study Guide With Questions And Answers 100% Verified.
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Relative Risk (RR) - correct answer is often used when the study involves comparing the likelihood, or chance, of an event occurring between two groups. Relative Risk utilizes the probability of an event occurring in one group compared to the probab...

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  • August 14, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • module 4 relative risk odds ratio

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Module 4: Relative Risk & Odds Ratio

Relative Risk (RR) - correct answer is often used when the study involves
comparing the likelihood, or chance, of an event occurring between two groups.



Relative Risk utilizes the probability of an event occurring in one group compared to the probability of
an event occurring in the other group.



Relative Risk (cont'd) - correct answer Incidence of outcome with exposure

RR = Incidence of outcome without exposure

RR = 1

RR > 1

RR < 1



Relative Risk Example - correct answer • Prospective cohort study

• Examined whether physical activity affects rates of death among women with breast cancer

• RR = 0.80 Women who exercised 3 to 8.9 MET hours per week compared with women who engaged in
less than 3 MET-hours per week (3 MET-hours is equal to walking at an average pace of 2 to 2.9 mph for
1 hour)



• RR = 0.80 Women who exercised 3 to 8.9 MET-hours per week compared with women who engaged in
less than 3 MET-hours per week

(1-RR) x 100 = (1-0.8) x 100 = 0.2 x 100 = 20%

Risk of death in women who exercised 3-8.9 MET hours per week was decreased by 20% relative to the
women who exercised less than 3 MET-hours per week



Prospective cohort study

• Examined the risk of lung cancer death based on to smoking status

• RR = 2.38 Men who were ex-smokers compared to never smokers

• RR = 4.46 Men who were current smokers compared to never smokers

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