ATI RN
Epidemiology Multiple Choice Questions Questions
Question 1 of 5
What does a likelihood ratio of greater than 1 indicate?
Correct Answer: B
Rationale: Likelihood ratio > 1 (B) means a positive result favors disease (e.g., LR+ = sensitivity / (1-specificity)). A, C, and D misinterpret.
Question 2 of 5
What is the main purpose of measuring disease prevalence?
Correct Answer: B
Rationale: Prevalence (B) quantifies disease burden (e.g., resource needs). A, C, and D are other aims.
Question 3 of 5
What does the term 'confounding' mean in epidemiology?
Correct Answer: C
Rationale: Confounding (C) mixes effects (e.g., age in smoking-cancer). A is error, B is bias, D is modification.
Question 4 of 5
Between 50 and 60 percent of fatal motor vehicle accidents in the United States are caused by drunk drivers, according to the Insurance Institute for Highway Safety. The most effective means to date of reducing drunk driving is
Correct Answer: D
Rationale: License suspension has the strongest evidence for reducing recidivism.
Question 5 of 5
Among patients with intermittent claudication, all the following statements are true EXCEPT
Correct Answer: A
Rationale: Only ~5-10% need amputation; others true.