Abstract
Time-series analyses were used to measure trends in restraint use and injuries, and to measure the effects of Michigan's mandatory child restraint law, implemented in April 1982. Restraint use in Michigan was found to vary considerably by age, alcolhol of drug use, seating position, number of vehicle occupants, injury severity, vehicle damage severity, vehicle size and type. The mandatory child restraint law was associated with a 208% increase in restaint usage among 1-3-years-olds, a 50% reduction in juries to infants under age 1, and, a 17% reduction in injuries to toddlers age 1-3.