EPIB301 Final Exam Questions with Correct
Answers
What is an experimental study?
The researcher assigns exposure
What is an observational study?
The researcher does NOT assign exposure
What defines a cohort study?
Start with exposure, follow to outcome
"cohort=cause yields consequence"
What defines a case-control study?
Start with the disease, look back for exposure
what defines cross-sectional study?
snapshot in time, measures prevalence
What defines an ecological study?
uses group-level data
What is a prospective cohort study?
start now..follow forward
what is a retrospective cohort study?
, use past data..look back
"retro=rewind"
what study design uses random assignment?
Randomized controlled trial
"RCT=Researcher Chooses treatment."
What measure is used in cohort studies?
Relative risk (RR)
"RR= Real Risk (you followed people to the outcome)"
What measure is used in case-control studies?
Odds Ratio (OR)
"OR= Only retrospective" (looking back for exposure)
Formula for RR?
incidence exposed/incidence unexposed
What does RR=1 mean
No association
1=same risk
What does RR > 1 mean?
increased risk
>1= bad (more risk)
What does RR <1 mean?
Answers
What is an experimental study?
The researcher assigns exposure
What is an observational study?
The researcher does NOT assign exposure
What defines a cohort study?
Start with exposure, follow to outcome
"cohort=cause yields consequence"
What defines a case-control study?
Start with the disease, look back for exposure
what defines cross-sectional study?
snapshot in time, measures prevalence
What defines an ecological study?
uses group-level data
What is a prospective cohort study?
start now..follow forward
what is a retrospective cohort study?
, use past data..look back
"retro=rewind"
what study design uses random assignment?
Randomized controlled trial
"RCT=Researcher Chooses treatment."
What measure is used in cohort studies?
Relative risk (RR)
"RR= Real Risk (you followed people to the outcome)"
What measure is used in case-control studies?
Odds Ratio (OR)
"OR= Only retrospective" (looking back for exposure)
Formula for RR?
incidence exposed/incidence unexposed
What does RR=1 mean
No association
1=same risk
What does RR > 1 mean?
increased risk
>1= bad (more risk)
What does RR <1 mean?
