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Table 8 Association of adiposity and periodontal status with sociodemographic and oral health behavioral factors at 12 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 < 0.001***

 

P = 0.892

 

P = 1.000

 

P = 1.000

 

P = 0.953

 

P = 0.718

 Male

122 (43.3%)

76 (62.3%)

46 (37.7%)

62 (50.8%)

60 (49.2%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

61 (50.0%)

40 (53.3%)

35 (46.7%)

50 (41.0%)

72 (59.0%)

 Female

160 (56.7%)

130 (81.3%)

30 (18.8%)

80 (50.0%)

80 (50.0%)

80 (50.0%)

80 (50.0%)

80 (50.0%)

80 (50.0%)

55 (52.9%)

49 (47.1%)

69 (43.1%)

91 (56.9%)

Parental employment status

  

P = 0.136

 

P = 0.454

 

P = 0.558

 

P = 0.935

 

P = 0.210

 

P = 0.679

 Both employed

180 (65.0%)

126 (70.0%)

54 (30.0%)

88 (48.9%)

92 (51.1%)

88 (48.9%)

92 (51.1%)

90 (50.0%)

90 (50.0%)

59 (49.6%)

60 (50.4%)

77 (42.8%)

103 (57.2%)

 At least one unemployed

97 (35.0%)

76 (78.4%)

21 (21.6%)

52 (53.6%)

45 (46.4%)

51 (52.6%)

46 (47.4%)

49 (50.5%)

48 (49.5%)

34 (59.6%)

23 (40.4%)

39 (40.2%)

58 (59.8%)

Family income

  

P = 0.418

 

P = 0.461

 

P = 0.523

 

P = 0.278

 

P = 0.335

 

P = 0.061

 Less than HK$ 10,000

72 (26.5%)

56 (77.8%)

16 (22.2%)

35 (48.6%)

37 (51.4%)

33 (45.8%)

39 (54.2%)

34 (47.2%)

38 (52.8%)

24 (61.5%)

15 (38.5%)

38 (52.8%)

34 (47.2%)

 HK$10,001-HK$30,000

139 (51.1%)

97 (69.8%)

42 (30.2%)

67 (48.2%)

72 (51.8%)

70 (50.4%)

69 (49.6%)

66 (47.5%)

73 (52.5%)

50 (52.6%)

45 (47.4%)

57 (41.0%)

82 (59.0%)

 More than HK$ 30,000

61 (22.4%)

46 (75.4%)

15 (24.6%)

35 (57.4%)

26 (42.6%)

34 (55.7%)

27 (44.3%)

36 (59.0%)

25 (41.0%)

17 (44.7%)

21 (55.3%)

20 (32.8%)

41 (67.2%)

Frequency of tooth brushing

  

P = 0.789

 

P = 0.450

 

P = 0.891

 

P = 0.337

 

P = 0.413

 

P = 0.399

 Less than twice a day

71 (25.2%)

51 (71.8%)

20 (28.2%)

33 (46.5%)

38 (53.5%)

35 (49.3%)

36 (50.7%)

32 (45.1%)

39 (54.9%)

21 (47.7%)

23 (52.3%)

33 (46.5%)

38 (53.5%)

 At least twice a day

211 (74.8%)

155 (73.5%)

56 (26.5%)

109 (51.7%)

102 (48.3%)

106 (50.2%)

105 (49.8%)

109 (51.7%)

102 (48.3%)

74 (54.8%)

61 (45.2%)

86 (4.08%)

125 (59.2%)

  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