EPIB301 Final Exam Questions with Correct Answers

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?