摘要: |
The principal goal of this child restraint survey has always been to estimate compliance with the relevant statutes in place at the time. Each summer, data were collected in the four metropolitan areas of Virginia (northern, eastern, central, and western) at the same sites, on the same day of the week, and at the same hour of the day. In 1997, sites in three mid-size cities with a population between 50,000 and 100,000 were added, as was data collection on safety belt use by occupants under 16 years of age. In 2002, additional sites in the existing mid-size cities were added to increase the sample size and a new mid-size city, Harrisonburg, was added. In addition, in 2002, the age categories used in the survey were changed to (1) infants and toddlers 0 through 3 years old, (2) preschoolers 4 through 5 years old, and (3) children 6 through 15 years old. These categories allowed the investigators to continue to analyze the longitudinal restraint use data and to evaluate the impact of the legislative changes made in 2002. |