TABLE 1

Child and Driver Characteristics of the Study Sample

CharacteristicOverall, Weighted % (Unweighted n) (N = 7151)BPB Seat, Weighted % (Unweighted n) (N = 1604)Seat Belt, Weighted % (Unweighted n) (N = 5547)Pa
Child characteristics
    Age, y<.001
        416.1 (1131)30.8 (517)9.7 (614)
        521.5 (1454)32.0 (495)16.9 (959)
        620.4 (1461)19.0 (315)21.0 (1146)
        721.3 (1558)13.6 (208)24.7 (1350)
        820.7 (1547)4.7 (69)27.7 (1478)
        4 to 537.6 (2585)62.7 (1012)26.6 (1573)<.001
        6 to 862.4 (4566)37.3 (592)73.4 (3974)
    Weight, lb<.001
        <409.5 (625)18.6 (296)5.5 (329)
        40–5956.4 (3829)66.9 (1064)51.8 (2765)
        60–7922.0 (1653)11.6 (192)26.5 (1461)
        ≥80+7.8 (601)1.7 (27)10.5 (574)
        Unknown4.3 (443)1.1 (25)5.7 (418)
    Seating position<.001
        Left outboard41.7 (2916)47.3 (747)39.3 (2169)
        Center14.1 (1148)5.4 (96)17.9 (1052)
        Right outboard44.2 (3087)47.3 (761)42.8 (2326)
Driver characteristics
    Age <25 y5.0 (455)5.5 (93)4.7 (362).370
    Male gender26.8 (1957)24.2 (411)27.9 (1546).032
    Restrained97.1 (6898)97.9 (1561)96.7 (5337).070
    Parent81.0 (5721)87.1 (1394)78.4 (4327)<.001
  • a P values between BPB seat and seat belt groups where applicable. For categorical (nondichotomous) variables, the P values refer to the differences in the distribution of the variables between the BPB seat and seat belt groups.