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The impact of primary laws on adult use of safety belts in U.S. is discussed in this paper. The data from the 2002 Behavioral Risk Factor Surveillance System (BRFSS) was analyzed by the Center for Disease Control. The results of that analysis indicated that the prevalence of self reported safety belt use was higher among states with primary laws than among states with secondary laws. The paper recommends that all states should enact primary laws to reduce deaths from motor vehicle crashes. The adult safety belt use in the U.S. ranks among the lowest of high income countries.
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A 2004 study studied this question.
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