. "Evidence Bearing on Causality." DPT Vaccine and Chronic Nervous System Dysfunction: A New Analysis. Washington, DC: The National Academies Press, 1994.
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DPT Vaccine and Chronic Nervous System Dysfunction: A New Analysis
TABLE 1 Categories of Evidence
Category
Committee to Review the Adverse Consequences of Pertussis and Rubella Vaccines
Vaccine Safety Committee
1
No evidence bearing on causality
No evidence bearing on causality
2
Evidence insufficient to indicate a causal relation
The evidence is inadequate to accept or reject a causal relation
3
Evidence does not indicate a causal relation
The evidence favors rejection of a causal relation
4
Evidence is consistent with a causal relation
The evidence favors acceptance of a causal relation
