## In this blog you will find the correct answer of the Coursera quiz Epidemiology: The Basic Science of Public Health 2 mixsaver always try to bring the best blogs and best coupon codes

Week- 2

Module 2 Quiz

1. What is the primary difference between risk and prevalence?

• Risk describes the number of diseased persons present in the population divided by the number of persons in the population during a specified time period, whereas prevalence describes the number of newly diseased person present in the population in a specified time period divided by the number of at- risk persons in the population.
• Prevalence describes the number of diseased person present in the population in a specified time period whereas risk describes the number of people who die from the disease in the population in a specified time period.
• Prevalence describes the number of diseased persons present in the population divided by the number of persons in the population in a specified time period, whereas risk describes the number of newly diseased person present in the population divided by the number of at-risk persons in the population in a specified time period.

2. Which of the following types of events can be measured by a risk and/or a rate?

• Recurrence of a disease
• Development of a drug or treatment side effect
• All of the above
• Newly developed cases of disease

3. True or false: The term “incidence” is used to refer to prevalence, risks and rates.

• True
• False

4. True or False: The formula for a rate is the number of existing cases of the disease outcome divided by the number of people studied, with a mention of the time period under observation.

• False
• True

5. True or False: The denominator of a risk is not fixed by the “at-risk” population size at the beginning of a study observation period.

• True
• False

6. In order to calculate a risk, which of the following steps must be taken? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)

• define a case definition for the health outcome under study
• determine the number of new cases of the outcome under study
• define the at-risk study population
• determine how many people in the study were exposed or unexposed to the exposure under study
• determine the number of males and females in the study

7. The denominator of a rate is affected by which of the following? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)

• loss to follow-up
• births
• deaths
• migration
• study drop-outs

8. Which of the following are advantages of using a rate measure? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)

• good for health outcomes or diseases that are of long duration
• suitable for a dynamic population
• good for health outcomes or diseases with long latent periods
• flexibility
• can accommodate repeated events that affect the same study participant

9. Which of the following measure(s) is/are able to capture the reality of a dynamic population? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)

• prevalence
• odds
• risk
• rate

10. If you are studying the rate of leukemia, which of the following events would affect a participant’s person-time? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)

• death
• participant goes out of town for a weekend
• participant decides to no longer participate in the study
• loss to follow-up
• being sick with influenza

11. If you are studying the rate of breast cancer, which of the following events would affect a participant’s person-time? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)

• loss to follow-up
• participant decides to no longer participate in the study
• death
• patient undergoes a double mastectomy
• diagnosis with uterine cancer

12. If you are studying the rate of relapse for lung cancer after treatment, which of the following events would affect a participant’s person-time? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)

• time of initial diagnosis with lung cancer
• time period(s) the patient is in remission from lung cancer
• participant decides to no longer participate in the study
• time period(s) when the patient is considered to have active lung cancer

13. Once the study population has been defined, the denominator of a risk is affected by which of the following? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)

• who is at risk of developing the health outcome
• loss to follow-up
• births
• migration
• deaths

14. Which of the following are acceptable ways to express “person-time”? (You must choose all that apply to receive credit for this question; no partial credit will be awarded.)

• person-months
• person-days
• person-years
• person-minutes

15. Which of the following measures is sometimes used because of its convenient mathematical properties?

• rate
• odds
• risk
• prevalence