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. 2004 Jun;94(6):1009–1013. doi: 10.2105/ajph.94.6.1009

TABLE 3—

Percentage of Cars With All Children Younger Than 12 Years Seated in the Rear, by Driver Seat Belt Use

Percentage of Cars
Preintervention Postintervention
Holyoke 33 49a,b
    Driver belted 36c 49
    Driver unbelted 29c 48
Control cities 28 41a,b
    Driver belted 32c 43
    Driver unbelted 24c 40

Note. Data collectors were able to observe shoulder-belt use only.

aP < .0001 for change across time periods.

bP < .0001 differences in the changes in rates between Holyoke and control cities.

cP < .01 for association between preintervention driver shoulder-belt use and postintervention rear seating.