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Table 9 Association of adiposity and periodontal status with sociodemographic and oral health behavioral factors at 18 years

From: Longitudinal association between obesity and periodontal diseases among secondary school students in Hong Kong: a prospective cohort study

Variable

n (%)

BMI

WC

WHR

WHtR

TRSKF

CPI

Underweight + normal weight n (%)

Overweight + Obese n (%)

≤median n (%)

>median n (%)

≤median n (%)

>median n (%)

≤median n (%)

>median n (%)

≤median n (%)

>median n (%)

≤ 50% index teeth with CPI = 0 n (%)

> 50% index teeth with CPI = 0 n (%)

Gender

  

P = 0.008**

 

P = 0.917

 

P = 1.000

 

P = 1.000

 

P = 0.835

 

P = 0.167

 Male

122 (43.3%)

97 (79.5%)

25 (20.5%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

88 (72.1%)

34 (27.9%)

 Female

160 (56.7%)

145 (90.6%)

15 (9.4%)

81 (50.6%)

79 (49.4%)

80 (50.0%)

80 (50.0%)

80 (50.0%)

80 (50.0%)

82 (51.3%)

78 (48.8%)

103 (64.4%)

57 (35.6%)

Parental employment status

  

P = 0.042*

 

P = 0.848

 

P = 0.592

 

P = 0.443

 

P = 0.123

 

P = 0.087

 Both employed

117 (61.3%)

95 (81.2%)

22 (18.8%)

60 (51.3%)

57 (48.7%)

60 (51.3%)

57 (48.7%)

62 (53.0%)

55 (47.0%)

53 (45.3%)

64 (54.7%)

85 (72.6%)

32 (27.4%)

 At least one unemployed

74 (38.7%)

68 (91.9%)

6 (8.1%)

39 (52.7%)

35 (47.3%)

35 (47.3%)

39 (52.7%)

35 (47.3%)

39 (52.7%)

42 (56.8%)

32 (43.2%)

45 (60.8%)

29 (39.2)

Family income

  

P = 0.774

 

P = 0.910

 

P = 0.911

 

P = 0.931

 

P = 0.447

 

P = 0.056

 Less than HK$ 10,000

23 (12.3%)

20 (87.0%)

3 (13.0%)

13 (56.5%)

10 (43.5%)

11 (47.8%)

12 (52.2%)

12 (52.2%)

11 (47.8%)

12 (52.2%)

11 (47.8%)

16 (69.6%)

7 (30.4%)

 HK$10,001-HK$30,000

99 (53.0%)

83 (83.8%)

16 (16.2%)

51 (51.5%)

48 (48.5%)

49 (49.5%)

50 (50.5%)

49 (49.5%)

50 (50.5%)

45 (45.5%)

54 (54.5%)

74 (74.7%)

25 (25.3%)

 More than HK$ 30,000

65 (34.8%)

57 (87.7%)

8 (12.3%)

34 (52.3%)

31 (47.7%)

34 (52.3%)

31 (47.7%)

34 (52.3%)

31 (47.7%)

36 (55.4%)

29 (44.6%)

37 (56.9%)

28 (43.1%)

Frequency of tooth brushing

  

P = 0.256

 

P = 0.062

 

P = 0.109

 

P = 0.180

 

P = 0.947

 

P = 0.147

 Less than twice a day

84 (29.9%)

69 (82.1%)

15 (17.9%)

35 (41.7%)

49 (58.3%)

36 (42.9%)

48 (57.1%)

37 (44.0%)

47 (56.0%)

43 (51.2%)

41 (48.8%)

62 (73.8%)

22 (26.2%)

 At least twice a day

197 (70.1%)

172 (87.3%)

25 (12.7%)

106 (53.8%)

91 (46.2%)

105 (53.3%)

92 (46.7%)

104 (52.8%)

93 (47.2%)

100 (50.8%)

97 (49.2%)

128 (65.0%)

69 (35.0%)

  1. CPI community periodontal index, BMI body mass index, WC waist circumference, WHR waist-hip ratio, WHtR waist-height ratio, TRSKF triceps skinfold thickness
  2. *P < 0.05, **P < 0.01, ***P < 0.001. P values were calculated through Chi-square tests