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Choose the best study design from the list below for each of the research questions. Each...

Choose the best study design from the list below for each of the research questions. Each study design can only be used once.

CaseControl study ,Prospective Cohort Study ,CrossSectional Study, Randomized Trial

a. Investigators want to assess the risk of mental health outcomes from prolonged online video game use among young adults.

b. A pharmaceutical company believes that a drug in combination with a support program for elder patients will be more effective than the drug alone.

c. A researcher believes that a rare disease in children may be associated with the use of a common cleaning agent.

d. An investigator wants to determine if the prevalence of asthma is higher in men than women.

Match the following terms to their corresponding descriptor. Please note each term may only be
used once.

Attack rate , Prevalence, Incidence rate , Risk difference
a. is often reported in crosssectional
studies to describe the proportion of a
population that has a disease at a
particular time
b. is used to describe how fast a disease
occurs in a population at a particular
time and is calculated by dividing new
cases by total persontime
c. is the excess in risk for a disease
associated with an exposure. When this
value is 0, the exposure does not add
risk
d. is most often used for outbreaks or acute
infections and is calculated by dividing
the number of new cases by the total
number of people at risk

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Answer #1

Answer to the second question.

a.is often reported in crosssectional
studies to describe the proportion of a
population that has a disease at a
particular time- Prevalence

b. is used to describe how fast a disease
occurs in a population at a particular
time and is calculated by dividing new
cases by total persontime -Attack rate

c. is the excess in risk for a disease
associated with an exposure. When this
value is 0, the exposure does not add
risk- Risk difference

d. is most often used for outbreaks or acute
infections and is calculated by dividing
the number of new cases by the total
number of people at risk - Incidence rate

Answer to Question 1

For the case (a), Prospective cohort study is suitable

(b) -Randomised trial

(C) -Case control

(d) -Cross sectional

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