Public Health Quiz #3: Measures of Risk

1. A study is conducted to assess the effect of a new antihypertensive drug on the incidence of stroke. Out of 1,000 patients treated with the drug, 30 patients develop a stroke. Meanwhile, out of 1,000 patients in the placebo group, 60 patients develop a stroke. What is the relative risk (RR) of developing a stroke in the treatment group compared to the placebo group?

Question 1 of 5

2. A cohort study investigates the association between smoking and lung cancer. It is found that the risk of developing lung cancer over 10 years is 20% among smokers and 2% among non-smokers. What is the absolute risk reduction (ARR) associated with not smoking?

Question 2 of 5

3. In a study assessing the impact of a new diet on reducing the incidence of type 2 diabetes, the number needed to treat (NNT) is found to be 25. What does this NNT value indicate?

Question 3 of 5

4. A case-control study on the association between a rare genetic disorder and exposure to a specific environmental toxin calculates the odds ratio (OR) as 4.0. What does this odds ratio suggest about the relationship between the genetic disorder and the toxin exposure?

Question 4 of 5

5. During a 5-year prospective cohort study, it was observed that the incidence of coronary heart disease (CHD) was 40 cases per 1,000 person-years in the group exercising regularly and 60 cases per 1,000 person-years in the non-exercising group. What measure of risk is being described here? 

Question 5 of 5


¡Por tiempo limitado!

Unete a nuestro boletín mensual y obtén todos nuestros talleres USMLE/ECFMG ¡GRATIS! (+100 videos)

¡Únete a nuestra comunidad de IMGs!

¡Obtén actualizaciones mensuales USMLE y ECFMG, además, obtén un taller USMLE gratis al instante!

"Taller 01: ¿Qué es el USMLE?”

Taller Gratuito USMLE

Este taller proporciona un análisis en profundidad de todos los exámenes USMLE, consejos para tomar exámenes y cómo estudiar de manera efectiva.


Especialista ECFMG: Dr. Carla Rebeca Lainez Casal

Facultad de Medicina: Universidad Catholica de Santiago de Guayaquil
ECFMG Certification date: October 13, 2022.
Residency: 2023 Internal Medicine Applicant
+1 7542724970