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What are cohort studies?

How are cohorts followed

Cohort study diagram

What’s the purpose of cohort studies?

Prospective or retrospective

What is incidence and prevalence?

How are participants and cohorts selected?

What type of bias is there in cohort studies?

How is exposure assessed

How is data collected and followed up?

What are confounding factors

Example of confounding factors

What is blinding

What are outcome measures

Example of a retrospective cohort study

What is risk ratio
•Risk is the probability that an event will happen
•Calculated by dividing the number of events by the number of people at risk.

Risk ratio example

Advantages and disadvantages

Summary
