N (3556)

RR (95% CI)

Properly rear seated

Use car seat or seatbelt

Age (years)

≤8

2391

0.349 (0.294, 0.415)**

0.715 (0.616, 0.831)**

>9

1165

Ref

Ref

Gender

Boy

1712

1.088 (0.940, 1.259)

0.945 (0.823, 1.086)

Girl

1844

Ref

Ref

Relationship with driver

Parent

3427

0.841 (0.569, 1.243)

1.303 (0.895, 1.896)

Not parent

129

Ref

Ref

Driver’s education

≥College

2245

1.318 (1.126, 1.544)**

1.024 (0.882, 1.189)

1311

Ref

Ref

Family income (RMB/year)

≥10 w

2144

1.272 (1.091, 1.483)**

1.014 (0.876, 1.173)

<10 w

1412

Ref

Ref

Understanding about car seat