Bradford Hill Criteria by Wikipedia

What are the Bradford Hill criteria useful for?
The Bradford Hill criteria are useful for establishing epidemiologic evidence of a causal relationship between a presumed cause and an observed effect.

How many principles are in the list of Bradford Hill criteria?
There are nine principles in the list of Bradford Hill criteria.

What is a causal relationship? (1)
A causal relationship is one where one process contributes to another process taking place.

What are the nine principles of the Bradford Hill criteria?
The nine principles of the Bradford Hill criteria are:

  1. Strength (effect size).
  2. Consistency (reproducibility).
  3. Specificity.
  4. Temporality.
  5. Biological gradient (dose-response relationship).
  6. Plausibility.
  7. Coherence.
  8. Experiment.
  9. Analogy.