Table 1 Overall and site-specific socio-demographic characteristics

N

6302

438

291

155

183

210

1295

232

184

465

485

443

92

493

316

752

268

Child’s age (year)

Mean

14.46

14.91

13.36

14.32

13.73

13.00

14.31

15.28

15.94

16.56

14.15

14.04

13.89

14.08

13.75

14.40

15.26

(SD)

(1.69)

(1.59)

(1.36)

(1.73)

(1.61)

(1.19)

(1.70)

(1.45)

(1.17)

(0.78)

(1.40)

(1.40)

(1.76)

(1.63)

(1.53)

(1.32)

(1.64)

% missing

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Child’s sex

% male

46.46

40.18

41.92

50.32

44.81

40.95

42.78

39.22

37.50

44.95

46.60

52.82

53.26

48.88

52.53

53.06

54.48

%missing

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Highest education in the household

% ≥College degree

46.67

35.39

73.54

32.26

15.85

66.67

35.29

60.78

35.87

55.70

73.81

76.07

58.70

40.77

47.15

24.87

53.73

% missing

11.22

45.66

1.72

36.13

54.10

3.33

0

1.29

18.48

0

1.03

0.23

0

0

0.32

38.16

3.36

Area level SES

% High

47.11

45.89

51.89

49.68

44.26

53.81

46.49

50.43

52.72

53.55

50.93

49.21

44.57

43.20

48.10

39.89

41.04

% missing

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Parental marital status

% married/LWP

75.47

43.84

84.88

48.39

36.61

83.81

89.65

78.45

65.22

78.71

79.59

87.58

94.57

72.01

95.57

57.18

82.84

% missing

10.73

43.38

0.69

36.77

51.37

0.48

0

0.43

18.48

0

1.03

0.23

1.09

0

0

37.23

3.73

Household size

Mean

4.67

4.28

4.31

3.87

3.90

4.23

4.16

4.34

3.78

3.77

4.30

4.22

5.93

4.26

4.56

5.66

12.11

(SD)

(2.62)

(1.09)

(1.07)

(1.21)

(1.08)

(1.29)

(1.16)

(1.15)

(1.15)

(0.86)

(1.42)

(1.22)

(4.04)

(1.31)

(1.72)

(1.97)

(7.08)

% missing

9.25

45.43

4.81

1.94

0

3.81

0

2.16

20.11

0.22

0.82

0

3.26

0

2.53

38.16

5.22

Children in the household

Mean

2.08

2.03

2.25

1.69

1.78

2.22

1.67

1.96

1.50

1.45

2.08

1.97

2.37

1.85

1.81

2.48

5.98

(SD)

(1.56)

(0.91)

(1.25)

(0.74)

(0.71)

(1.12)

(0.75)

(0.97)

(0.95)

(0.58)

(1.21)

(0.96)

(1.66)

(0.98)

(0.69)

(1.35)

(4.08)

% missing

10.04

45.89

3.78

4.52

0.55

2.86

0

1.72

28.80

3.87

0.82

0

0

0.41

6.01

38.96

5.22

Motor vehicle in the household

% 0

20.63

0.91

4.81

5.16

4.92

7.62

69.19

11.21

5.98

7.31

2.06

0.90

68.48

18.86

23.42

1.33

10.45

% 1

27.21

15.07

38.49

31.61

23.50

48.10

22.86

41.81

26.09

45.59

15.88

9.26

25.00

41.99

46.84

14.23

32.84

% 2

25.83

26.71

42.61

19.35

11.48

35.24

6.18

37.93

38.59

33.12

45.77

42.89

1.09

28.40

18.35

24.47

27.61

% 3+

14.74

12.33

12.37

4.52

2.73

5.71

1.78

7.76

8.70

13.98

34.85

46.73

5.43

10.75

6.96

22.47

25.37

% missing

11.58

44.98

1.72

39.35

57.38

3.33

0

1.29

20.65

0

1.44

0.23

0

0

4.43

37.50

3.73

Licensed driver in the household

% 0

13.71

0.23

1.72

1.94

1.64

3.33

39.46

6.47

2.72

3.23

1.24

0.23

66.30

16.43

22.15

0.93

27.24

% 1

23.48

10.50

18.90

12.90

13.66

21.43

32.28

25.43

15.22

26.02

11.75

7.00

26.09

30.22

55.70

14.63

43.28

% 2

38.08

32.88

73.20

35.48

23.50

62.86

26.25

42.67

49.46

51.18

57.11

60.50

1.09

38.95

17.72

27.79

15.67

% 3+

13.42

11.42

4.81

10.32

5.46

9.05

2.01

25.00

13.59

19.57

28.45

32.05

5.43

14.40

3.16

19.28

9.70

% missing

11.30

44.98

1.37

39.35

55.74

3.33

0

0.43

19.02

0

1.44

0.23

1.09

0

1.27

37.37

4.10