Impaired driving and legalization of recreational cannabis.

CMAJ · 2021 · PMC8049641 · PMID 33824147

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a nonsignificant trendno p-value reported

Another 2019 study also compared fatal crashes after recreational cannabis legalization in Colorado and Washington, 12 showing a nonsignificant trend toward increased fatal motor vehicle crashes over the 5 years before and after legalization compared with control states.

also in 5,406 other papers

Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.