May Virtual Journal Club SBA: Summative Assessment

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Question 1 of 5

1. Question
Please complete the sentence:

Case control studies…
- are retrospective studies comparing a population with an outcome to a population without an outcome to identify risk factors/characteristics that could lead to the development of that outcome.
- start with a population who share common characteristics and investigate the frequency of an outcome.
- a process or record of research into the development of a particular person, group, or situation over a period of time.
- are longitudinal studies.
- are only performed prospectively.
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Question 2 of 5

2. Question
Please complete the sentence:

External validity…
- assesses whether the manner in which a study was conducted allows it to truthfully answer the question posed.
- describes the consistency with which results are obtained.
- examines whether the results of a study, or screening score can be generalised to other contexts.
- is confirmed using derivation studies.
- is not essential when considering the use of a new score in your department.
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Question 3 of 5

3. Question
Please complete the sentence:

Positive likelihood ratio…
- is calculated using the following formula Specificity / (1 – sensitivity) at that threshold.
- is how many times more likely you are to get a positive result in someone with the disease than in someone without the disease.
- of 1 represents a good test to rule in a condition.
- is dependent on prevalence.
- is how many times more likely you are to get a negative result in someone with the disease than in someone without the disease.
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Question 4 of 5

4. Question
Please complete the sentence:

Area under the curve…
- is the percentage chance of the score differentiating a patient who will have a poor outcome versus one with a good outcome.
- of 0.5 represents a useful test.
- is calculated from Kaplan-Meier curves.
- is used in therapeutic studies to describe usefulness of a therapy.
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Question 5 of 5

5. Question
Please complete the sentence:

Absolute net reclassification index…
- is the net proportion of patients reclassified by a new model.
- computes the proportions moving up or down in risk strata in cases and non-cases separately.
- is (the proportion of patient incorrectly reclassified in outcome group) + (proportion of patients correctly reclassified in no outcome group) – proportion of patient incorrectly reclassified in no outcome group)
- is used to define scores where there has been no gold standard model in that condition previously.
- is useful when comparing therapies.
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May Virtual Journal Club – Prospective validation of Canadian TIA Score and comparison with ABCD2 and ABCD2i for subsequent stroke risk after transient ischaemic attack

May Virtual Journal Club SBA: Summative Assessment

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