December Virtual Journal Club – Summative Assessment

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Question 1 of 5

1. Question
When considering regression…
- it quantifies the strength of association between two variables.
- it quantifies how an independent variable affects a dependent variable.
- the X and Y variables are interchangeable.
- is represented by r, which is a value between -1 and 1.
- a regression slope can be negative even when the correlation is positive.
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Question 2 of 5

2. Question
Fisher’s exact test…
- is typically used when the data is represented as 2×2 contingency table.
- is a parametric test.
- can only be used with paired data.
- can only be used with a large population.
- gives an approximate estimate of independence.
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Question 3 of 5

3. Question
An odds ratio…
- of 0 means no difference between two groups.
- can understate the effect of a treatment on an outcome measure where the outcome is not rare.
- is the only way to represent strength of association between exposure and outcome in cohort studies.
- is used to represent association between variables in logistic regression.
- is the ratio of risk of an event in one group (e.g., exposed group) versus the risk of the event in the other group.
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Question 4 of 5

4. Question
Categorical variables…
- often follow a logical order.
- are numeric variables that have a countable number of values between any two values.
- numeric variables that have an infinite number of values between any two values.
- is one that has two or more categories, but there is no intrinsic ordering to the categories.
- are also called quantitative variables.
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Question 5 of 5

5. Question
Cohort studies…
- are when researchers identify people with an existing health problem (“cases”) and a similar group without the problem (“controls”) and then compare them with respect to an exposure or exposures.
- is when researchers compare what happens to members of a certain group that have been exposed to a particular variable to what happens to the other members who have not been exposed.
- use only odd ratios to demonstrate association.
- is one where researchers introduce an intervention and study the effects. Experimental studies are usually randomized, meaning the subjects are grouped by chance.
- are a type of experimental study.
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December Virtual Journal Club – Fluid balance and outcome in critically ill patients with traumatic brain injury (CENTER-TBI and OzENTER-TBI): a prospective, multicentre, comparative effectiveness study

December Virtual Journal Club – Summative Assessment

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