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Table 2 Distribution of social behaviour factors between NC and S-ECC groupa

From: The rs35874116 single nucleotide polymorphism increases sweet intake and the risk of severe early childhood caries: a case–control study

Indicator

NC group

(n = 118)

S-ECC group

(n = 118)

x2

P

Gender

  

0.610

0.435

 Boy

55 (46.6)

61 (51.7)

  

 Girl

63 (53.4)

57 (48.3)

  

Single child

  

0.155

0.694

 No

53 (44.9)

50 (42.4)

  

 Yes

65 (55.1)

68 (57.6)

  

Caregiver’s type

  

3.401b

0.183

 Parent

95 (80.5)

83 (70.3)

  

 Grandparent

22 (18.6)

34 (28.8)

  

 Other

1 (0.9)

1 (0.9)

  

Marital status of parents

  

0.254b

0.614

 Cohabiting

115 (97.5)

117 (99.2)

  

 Not Cohabiting

3 (2.5)

1 (0.8)

  

Mother’s education

  

15.275

< 0.001

 ≤ 12 year

5 (4.2)

25 (21.2)

  

 >12 year

113 (95.8)

93 (78.8)

  

Father’s education

  

1.967

0.161

 ≤ 12 year

7 (5.9)

13 (11.0)

  

 >12 year

111 (94.1)

105 (89.0)

  

Mother’s occupation

  

0.711

0.701

 Employer / Professional

79 (66.9)

73 (61.9)

  

 Employee / Non-professional

35 (29.7)

41 (34.7)

  

 Unemployed

4 (3.4)

4 (3.4)

  

Father’s occupation

  

5.743b

0.057

 Employer / Professional

81 (68.6)

70 (59.3)

  

 Employee / Non-professional

37 (31.4)

45 (38.1)

  

 Unemployed

0 (0.0)

3 (2.5)

  

Family income

  

1.374

0.241

 < 4000 RMB

62 (52.5)

53 (44.9)

  

 ≥ 4000 RMB

56 (47.5)

65 (55.1)

  

Frequency of sweet intake

  

6.797

0.009

 < 1 time/day

72 (61.0)

52 (44.1)

  

 ≥ 1 time/day

46 (39.0)

66 (55.9)

  

Frequency of tooth brushing

  

0.434

0.51

 ≥ 1 time/day

105 (89.0)

108 (91.5)

  

 < 1 time/day

13 (11.0)

10 (8.5)

  

Use of fluoride toothpaste

  

0.256

0.613

 No

20 (16.9)

23 (19.5)

  

 Yes

98 (83.1)

95 (80.5)

  
  1. aS-ECC group were those children with decayed, missing, and filled teeth value equal to or more than six, and the non-caries (NC) group had no caries.bby Fisher’s exact probability test