Journal
HUMAN AND ECOLOGICAL RISK ASSESSMENT
Volume 16, Issue 1, Pages 53-73Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10807030903459320
Keywords
causation; epidemiology; environmental evidence; environmental assessment; Hill's criteria; weight of evidence; causal analysis
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We suggest that there are six fundamental characteristics of causation: time order, co-occurence, preceding causation, sufficiency, interaction and alteration. The cause precedes the effect (time order). The cause co-occurs with the unaffected entity in space and time (co-occurrence). Causes and their effects are the result of a web of causation (preceding causation). The intensity, frequency, and duration of the cause are adequate and the susceptable entity can exhibit the type and magnitude of the effect (sufficiency). The cause effectively interacts with the entity in a way that induces the effect (interaction). And, the entity is changed by the interactions with the cause (alteration). In contrast to Hill's criteria, the causal characteristics are distinct from the (1) evidence that is used to document causal characteristcs, (2) sources of information used to develop the evidence, and (3) qualities used to evaluate evidence of causal characteristics and body of evidence for the causal relationship. Evidence of causal characteristics can form the basis for assessments of epidemiological studies and can structure an explanatory narrative that is causally relevant and substantive. Six core characteristics amy be easier to organize, evaluate. communicate, and for decision-makers to assimilate, remember, and inspire action.
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