Cohort Study

Learning Objectives

A. Learn to apply the main features of a cohort study

  1. Formulate a research hypothesis
  2. Define the 'at risk' population
  3. Define eligibility criteria for study participants
  4. Define exposure and outcome
  5. Understand cohort studies based on the timing of events

B. Conduct data analyses consistent with a cohort design

  1. Calculate and interpret the risk ratio using frequencies
  2. Calculate and interpret the rate ratio using person-time information
  3. Calculate and interpret the standardized incidence ratio (SIR)

C. Interpret your findings

  1. Understand the differences between a risk ratio and a rate ratio
  2. Discuss how subgroup analyses influence our certainty about study results
  3. Discuss the value of age standardization