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CDM Exam with Questions and Correct Answers
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CDM Exam with Questions and Correct Answers
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CDM Exam with Questions and CorrectAnswers
What does PICO stand for?
P: Population
I: Intervention
C: Comparison
O: Outcome
Which type of study is best at answering questions about prevention?
RCT
Which type of study is best at answering questions about screening?
RCT
Which types of studies are best at answering questions about diagnostic accuracy?
RCT and cohort
Which type of study is best at answering questions about prognosis?
Cohort
Which type of study is best at answering questions about incidence?
Cohort
Which type of study is best at answering questions about prevalence?
Cohort
Which type of study is best at answering questions about etiology?
Cohort
Which type of study is best at answering questions about therapy?
RCT
Which types of studies are best at answering questions about toxicity?
RCT, cohort and case-control
Absolute risk
, # of people who have an event over a period of time/# of all people for whom the event is
possible over a given period of time
Relative risk is AKA
risk ratio
Relative risk (risk ratio)
Absolute risk of a disease in group A/absolute risk of disease in group B (compares AR of two
groups)
Absolute risk difference
AR of group A - AR of group B
Risk
Incidence of a new disease/the entire population being studied
Relative risk reduction (difference)
Absolute risk difference/AR of the treatment group
Odds ratio
(# with an event/# without an event in the exposed group)/(# with an event/# without an event
in the control group)
The level of probability of chance in an outcome
Alpha level
What is the standard alpha level?
0.05
The range of outcomes within a 95% certainty or in other words, 2 standard deviations from
the mean result. This range gives us an idea of where the "true" result is estimated to lie. It
tells us how precise an estimate is (if it is statistically significant). Narrow results are more
precise!
Confidence interval
The statistical value that indicates if the difference between the results in caused purely by
chance. The probability that we could have obtained the observed data if there was no
association between the intervention and the outcome. Results are statistically significant
when <0.05.
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