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Exam (elaborations)

NR503 Final Exam 2020 - Chamberlain College of Nursing

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NR 503 Epidemiology Final Exam (Latest): Chamberlain College of Nursing (FOR 100% CORRECT ANSWER CHECK THE LAST PAGE) Question A randomized, double-blind clinical trial of a varicella vaccine observed an estimated incidence of 25% chickenpox episodes in persons receiving the vaccine, compared to 80% among persons receiving a placebo. The estimated efficacy of the vaccine is:  55.0%  65.0%  68.8%  71.4%  80.0% Explanation The efficacy is calculated by subtracting the rate in those vaccinated from the placebo rate and dividing by the placebo rate. In this example, 80% minus 25% equals 55%. Dividing by 80% results in an efficacy of 68.8%. CONTINUES...

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NR 503








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Michael O\'Callaghan Biology Plus
  • 2013
  • 9781845365578
  • Unknown

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Chamberlain College Of Nursing
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NR 503

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  • nr 503
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  • nr503 final exam 2020 chamberlain college of nursing
  • double blind clinical trial of a varicella vaccine observed an estimated incidence of 25 chickenpox episodes in persons rec
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