Activity - Strengths and weaknesses

Listed below are strengths and weaknesses of cohort studies. Please drag each into the correct column below.

Strengths

  • Multiple outcomes can be measured for any one exposure
  • Can establish incidence directly
  • Demonstrate direction of causality
  • Can be used to look at detrimental interventions

Weaknesses

  • Long periods of follow-up needed
  • Knowledge of exposure status may bias
    classification of the outcome
  • Large sample sizes needed
  • Being in the study may alter participant's behaviour
  • Multiple outcomes can be measured
    for any one exposure
  • Can establish incidence directly
  • Demonstrate direction of causality
  • Can be used to look at detrimental interventions
  • Long periods of follow-up needed
  • Knowledge of exposure status may
    bias classification of the outcome
  • Large sample sizes needed
  • Being in the study may alter participant's behaviour