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Table 2 Characteristics of children with caries increment from age 3- to 7 years and of their parents

From: Birth order is associated with caries development in young children: a register-based cohort study

Variables

Caries increment (Δ deft = 0)

Caries increment (Δ deft > 0)

(n = 50,548)

(n = 14,711)

%

% Pa

Gender

 Boy

77

23 < 0.001

 Girl

78

22

Birth order

 First-born

81

19 < 0.001

 Second-born

78

22

 Third-born

71

29

 Fourth-born

61

39

 Fifth- or later-born

52

48

Maternal country of birth

 Sweden

83

17 < 0.001

 Abroad

60

40

Paternal country of birth

 Sweden

83

17 < 0.001

 Abroad

61

39

Maternal education level

  ≥ 13 years

83

17 < 0.001

 10–12 years

74

26

  ≤ 9 years

57

43

Family situation

 Cohabiting

78

22 < 0.001

 Single

66

34

Family income

 First quintile (highest)

85

15 < 0.001

 Second quintile

83

17

 Third quintile

80

20

 Fourth quintile

75

24

 Fifth quintile (lowest)

64

36

Social welfare allowance

 No

78

22 < 0.001

 Yes

55

45

Maternal smoking in early pregnancy

 No

86

14 < 0.001

 Yes

81

19

Maternal BMI in early pregnancy

  < 25.00

79

21 < 0.001

 25.0029.99

75

25

  ≥ 30.00

70

30

Maternal age at delivery

 25–34 years

79

21 < 0.001

  < 25 years

64

36

  ≥ 35 years

78

22

  1. aP-values refer to univariate analyses in a binary logistic regression model