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UNITED STATES DEPARTMENT OF LABOR

Evidence Rating

The level of confidence in a study’s ability to estimate causal impacts

High causal evidence

Strong evidence that the effects estimated in a study are solely caused by the intervention being examined

Moderate causal evidence

Evidence that the effects estimated in a study are caused by, at least in part, to the intervention being examined, but other factors not accounted for in the study might also have contributed

Low causal evidence

Little evidence that the effects estimated in a study are solely caused by the intervention being examined, and other factors are likely to have contributed to the results