Bradford Hill Criteria

Bradford Hill Criteria

Bradford Hill Criteria

Proposed by Sir Austin Bradford Hill in 1965, the considerations include strength of association, consistency across studies, specificity, temporality, biological gradient or dose-response, plausibility, coherence, experimental evidence, and analogy.

Only temporality is universally regarded as necessary; the others are considerations rather than requirements.

Alternative Names:

Hill Criteria, Bradford Hill Considerations

Why it Matters?

The criteria are the standard framework experts use to move from association to causation, which makes them the structure a Daubert challenge should track. The productive critique is not that the expert used Hill but that they applied it selectively, invoking supportive considerations while ignoring dose-response failures or inconsistent study results. Experts who recite the criteria without analyzing each are vulnerable on methodology.

Frequently asked questions

Must all nine criteria be satisfied?

Must all nine criteria be satisfied?

No. Only temporality is considered necessary. The others are considerations weighed together, which is why selective application is the common ground for challenge.

How is a Hill analysis challenged?

How is a Hill analysis challenged?

By showing the expert applied the criteria selectively, ignored contrary evidence on dose-response or consistency, or recited them without genuine analysis.