Bradford Hill: the environment and disease—association or causation?

What changed

Set out nine considerations for judging whether an observed association can reasonably receive a causal interpretation in occupational and environmental epidemiology.

Scientific scope

The record is the exact 1965 paper. The considerations are guidance rather than necessary-and-sufficient causal criteria; later counterfactual frameworks, causal diagrams and regulatory applications remain separate.

Evidence

The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is the exact 1965 paper. The considerations are guidance rather than necessary-and-sufficient causal criteria; later counterfactual frameworks, causal diagrams and regulatory applications remain separate.

Contributors

• Austin Bradford Hill · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.

• SAGE record for Bradford Hill association and causation
• PMC archival republication of Bradford Hill 1965

Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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