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Questions and Answers
What is the capital of France? (example question)
What is the capital of France? (example question)
- Paris (correct)
- London
- Berlin
- Madrid
Flashcards
Relative Risk Equation (RR)
Relative Risk Equation (RR)
RR = Events in treated group / Events in non-treated group
Median Survival Time
Median Survival Time
Time when 50% of patients remain alive
A randomized control trial is conducted to compare a new anticoagulant drug (Drug A) to one that has been the standard of care (Drug B). There are 1000 high risk patients enrolled; 500 are randomized to each treatment arm and are followed for two years to see who develops a deep vein thrombosis (DVT). Over the next two years, 25 patients who received Drug A and 45 patients who received Drug B develop DVTs.
What is the Relative Risk of developing a DVT if a patient is on Drug A compared to Drug B?
A randomized control trial is conducted to compare a new anticoagulant drug (Drug A) to one that has been the standard of care (Drug B). There are 1000 high risk patients enrolled; 500 are randomized to each treatment arm and are followed for two years to see who develops a deep vein thrombosis (DVT). Over the next two years, 25 patients who received Drug A and 45 patients who received Drug B develop DVTs. What is the Relative Risk of developing a DVT if a patient is on Drug A compared to Drug B?
RR = (Events in treated group/Total in treated group) / (Events in non-treated groups/Total in non-treated group)
25/500 ÷ 45/500 = 0.05 ÷ 0.09 = 0.55
Relative Risk Rate (RRR)
Relative Risk Rate (RRR)
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Absolute Risk Reduction (ARR)
Absolute Risk Reduction (ARR)
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Number needed to treat
Number needed to treat
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