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

Table 4 Longitudinal association between CPI at 12 years and adiposity indices at 15 years through binary logistic regression

Dependent Variable	Model 1^a			Model 2^b			Model 3^c
Dependent Variable	OR	95% CI	P	OR	95% CI	P	OR	95% CI	P
BMI	1.25	0.69, 2.29	0.462	1.27	0.68, 2.38	0.452	1.26	0.67, 2.35	0.477
WC	1.29	0.80, 2.07	0.295	1.34	0.81, 2.20	0.252	1.32	0.81, 2.18	0.269
WHR	1.55	0.96, 2.49	0.071	1.43	0.88, 2.34	0.152	1.41	0.86, 2.32	0.173
WHtR	1.28	0.80, 2.06	0.309	1.24	0.76, 2.02	0.396	1.22	0.74, 2.00	0.435
TRSKF	1.24	0.77, 1.99	0.378	1.19	0.73, 1.95	0.480	1.19	0.73, 1.94	0.496

CPI Community Periodontal Index, CI conference interval, BMI body mass index, WC waist circumference, WHR waist-hip ratio, TRSKF triceps skinfold thickness
Dependent variable: Adiposity indices at 15 years. Participants were classified into underweight/normal weight group vs overweight/obese group (event group) according to BMI. WC, WHR, WHtR and TRSKF dichotomized participants at median (participants in the upper 50th percentile constitute the reference group)
Independent variable: CPI at 12 years. Participants were classified by as having ≤50% index teeth with CPI = 0 vs > 50% index teeth with CPI = 0 (reference group)
^aModel 1: Adjusted for gender
^bModel 2: Adjusted for socioeconomic factors (parental employment status and family income) at 12 years
^cModel 3: Fully adjusted model. Model 2 plus behavioral factors (frequency of tooth brushing) at 12 years
* P < 0.05, ** P < 0.01

ISSN: 1472-6831