Skip to main content

Table 1 Association of adiposity and periodontal status with sociodemographic and oral health behavioral factors at 15 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 = 0.020*

 

P = 0.974

 

P = 1.000

 

P = 0.958

 

P = 0.603

 

P = 0.002**

 Male

122 (43.3%)

91 (74.6%)

31 (25.4%)

62 (50.8%)

60 (49.2%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

82 (67.2%)

40 (32.8%)

 Female

160 (56.7%)

137 (85.6%)

23 (14.4%)

81 (50.6%)

79 (49.4%)

80 (50.0%)

80 (50.0%)

80 (50.3%)

79 (49.7%)

85 (53.1%)

75 (46.9%)

78 (48.8%)

82 (51.3%)

Parental employment status

  

P = 0.022*

 

P = 0.009**

 

P = 0.580

 

P = 0.184

 

P = 0.079

 

P = 0.139

 Both employed

167 (62.5%)

128 (76.6%)

39 (23.4%)

76 (45.5%)

91 (54.5%)

81 (48.5%)

86 (51.5%)

79 (47.6%)

87 (52.4%)

80 (47.9%)

87 (52.1%)

99 (59.3%)

68 (40.7%)

 At least one unemployed

100 (37.5%)

88 (88.0%)

12 (12.0%)

62 (62.0%)

38 (38.0%)

52 (52.0%)

48 (48.0%)

56 (56.0%)

44 (44.0%)

59 (59.0%)

41 (41.0%)

50 (50.0%)

50 (50.0%)

Family income

  

P = 0.295

 

P = 0.946

 

P = 0.081

 

P = 0.790

 

P = 0.204

 

P = 0.387

 Less than HK$ 10,000

43 (16.2%)

37 (86.0%)

6 (14.0%)

23 (53.5%)

20 (46.5%)

21 (48.8%)

22 (51.2%)

20 (46.5%)

23 (53.5%)

24 (55.8%)

19 (44.2%)

26 (60.5%)

17 (39.5%)

 HK$10,001-HK$30,000

144 (54.1%)

112 (77.8%)

32 (22.2%)

73 (50.7%)

71 (49.3%)

65 (45.1%)

79 (54.9%)

75 (52.4%)

68 (47.6%)

67 (46.5%)

77 (53.5%)

83 (57.6%)

61 (42.4%)

 More than HK$ 30,000

79 (29.7%)

67 (84.8%)

12 (15.2%)

41 (51.9%)

38 (48.1%)

48 (60.8%)

31 (39.2%)

40 (50.6%)

39 (49.4%)

46 (58.2%)

33 (41.8%)

39 (49.4%)

40 (50.6%)

Frequency of tooth brushing

  

P < 0.001***

 

P = 0.010*

 

P = 0.015*

 

P = 0.001**

 

P = 0.087

 

P = 0.020*

 Less than twice a day

74 (26.2%)

49 (66.2%)

25 (33.8%)

28 (37.8%)

46 (62.2%)

28 (37.8%)

46 (62.2%)

25 (33.8%)

49 (66.2%)

32 (43.2%)

42 (56.8%)

50 (67.6%)

24 (32.4%)

 At least twice a day

208 (73.8%)

179 (86.1%)

29 (13.9%)

115 (55.3%)

93 (44.7%)

113 (54.3%)

95 (45.7%)

116 (56.0%)

91 (44.0%)

114 (54.8%)

94 (45.2%)

108 (51.9%)

100 (48.1%)

  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
  3. P values were calculated through Chi-square tests