The impact of legislation on self-reported safety belt use in a working population.

To assess the impact of safety belt laws, we compared self-reported use of safety belts among employed residents of states with primary, secondary, and no laws in a group of 17,830 volunteer health profile participants. Failure to wear safety belts at least 80% of the time was reported by 22% of subjects covered by primary laws, 23% of those covered by secondary laws, and 39% of those not covered by any law.