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27 October
6:14 pm

University of Iowa put out a study saying that 75 percent of the difference between Iowa's cancer rate and the average state's cancer rate is attributable to choices that we make — smoking, drinking, exercise — and 25 percent is attributable to what's around us.

Overstated

Rob Sand, at Iowa Governor General Election Debate (KCRG / The Gazette)

6:14 pm
Why this verdict View evidenceHide evidence
Why we checked itSpecific percentage breakdown from a named institution (University of Iowa) attributing Iowa's excess cancer burden to behavioral vs. environmental factors — verifiable against the cited study.
What we foundThe University of Iowa study does exist and does find that roughly 75–76% of Iowa's excess cancer rate is explained by demographic and behavioral factors, but the claim overstates the study by characterizing the remaining 25% as attributable to environment, when the study has not yet investigated environmental factors.
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