PUBH 401: Quiz 5 Final Exam Questions
And Answers Graded A+.
In this cohort study on the association between smoking and lung cancer, what measure of
association would you use if you wanted to emphasize the public health impact of smoking? -
Answer - Risk ratio (relative risk)
- Odd ratio
From the table, the most likely explanation for the differences in rates of ASHD between the
initial examination and the yearlyfollow-up examinations in men is: - Answer The initial
examination measures the prevalence of ASHD, whereas the subsequent examinations primarily
measure the incidence of ASHD
Epidemiologists decided to investigate the effect of sunscreens on sunburns. They ran an
epidemiologic study to see the association of sunscreens and sunburns. Overall, 460 people
have enrolled in the study. Investigators randomly allocated 230 people to the treatment group
(sunscreens) and 230 to the control group (placebo). They exposed those 460 people to the high
mountain trail on a sunny day. At the end of the study, 30 people developed sunburns in the
sunscreen group and 130 people developed sunburns in the placebo group.
What is the risk of developing sunburns in the placebo group? (Answer to 2 or 3 decimal places)
- Answer 0.565
OR
0.57
The following information summarizes the exercise status and obesity status in a case-control
study.
What is the odds ratio of regular exercise in this study?
Use the following table to answer the question. (answer to 2 decimal places)
Exercise Status by Obesity Status - Answer 0.44
, Epidemiologists decided to investigate the effect of sunscreens on sunburns. They ran an
epidemiologic study to see the association of sunscreens and sunburns. Overall, 460 people
have enrolled in the study. Investigators randomly allocated 230 people to the treatment group
(sunscreens) and 230 to the control group (placebo). They exposed those 460 people to the high
mountain trail on a sunny day. At the end of the study, 30 people developed sunburns in the
sunscreen group and 130 people developed sunburns in the placebo group.
What is the odd ratio (OR) of developing sunburns in the treatment group compared to the
placebo group? (Answer to 2 decimal places) - Answer 0.11
OR
0.12
Epidemiologists decided to investigate the effect of sunscreens on sunburns. They ran an
epidemiologic study to see the association of sunscreens and sunburns. Overall, 460 people
have enrolled in the study. Investigators randomly allocated 200 to the control group (placebo)
and the remaining to the treatment group (sunscreen). They exposed those 460 people to the
high mountain trail on a sunny day. At the end of the study, 30 people developed sunburns in
the sunscreen group and 130 people developed sunburns in the placebo group.
What is the odds of developing sunburns in the treatment (sunscreen) group? (Answer in
ratio/fraction/2 decimals) - Answer 3:23
OR
3/23
OR
0.13
Which of the following generally cannot be estimated in a case-control study? - Answer
Incidence rate
And Answers Graded A+.
In this cohort study on the association between smoking and lung cancer, what measure of
association would you use if you wanted to emphasize the public health impact of smoking? -
Answer - Risk ratio (relative risk)
- Odd ratio
From the table, the most likely explanation for the differences in rates of ASHD between the
initial examination and the yearlyfollow-up examinations in men is: - Answer The initial
examination measures the prevalence of ASHD, whereas the subsequent examinations primarily
measure the incidence of ASHD
Epidemiologists decided to investigate the effect of sunscreens on sunburns. They ran an
epidemiologic study to see the association of sunscreens and sunburns. Overall, 460 people
have enrolled in the study. Investigators randomly allocated 230 people to the treatment group
(sunscreens) and 230 to the control group (placebo). They exposed those 460 people to the high
mountain trail on a sunny day. At the end of the study, 30 people developed sunburns in the
sunscreen group and 130 people developed sunburns in the placebo group.
What is the risk of developing sunburns in the placebo group? (Answer to 2 or 3 decimal places)
- Answer 0.565
OR
0.57
The following information summarizes the exercise status and obesity status in a case-control
study.
What is the odds ratio of regular exercise in this study?
Use the following table to answer the question. (answer to 2 decimal places)
Exercise Status by Obesity Status - Answer 0.44
, Epidemiologists decided to investigate the effect of sunscreens on sunburns. They ran an
epidemiologic study to see the association of sunscreens and sunburns. Overall, 460 people
have enrolled in the study. Investigators randomly allocated 230 people to the treatment group
(sunscreens) and 230 to the control group (placebo). They exposed those 460 people to the high
mountain trail on a sunny day. At the end of the study, 30 people developed sunburns in the
sunscreen group and 130 people developed sunburns in the placebo group.
What is the odd ratio (OR) of developing sunburns in the treatment group compared to the
placebo group? (Answer to 2 decimal places) - Answer 0.11
OR
0.12
Epidemiologists decided to investigate the effect of sunscreens on sunburns. They ran an
epidemiologic study to see the association of sunscreens and sunburns. Overall, 460 people
have enrolled in the study. Investigators randomly allocated 200 to the control group (placebo)
and the remaining to the treatment group (sunscreen). They exposed those 460 people to the
high mountain trail on a sunny day. At the end of the study, 30 people developed sunburns in
the sunscreen group and 130 people developed sunburns in the placebo group.
What is the odds of developing sunburns in the treatment (sunscreen) group? (Answer in
ratio/fraction/2 decimals) - Answer 3:23
OR
3/23
OR
0.13
Which of the following generally cannot be estimated in a case-control study? - Answer
Incidence rate
