Epidemiology: The Basic Science of Public Health 2

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.)