Related factors of periodontal health among Chinese middle school students, findings from a national cross-sectional survey

Table 3 The generalized linear mixed model of gingival bleeding

	Coefficient	Sig.	Exp (coefficient)	95% CI for exp (coefficient)
	Coefficient	Sig.	Exp (coefficient)	Lower	Upper
Intercept	0.87		2.39	1.52	3.75
Gender
Male	0.11	< 0.001	1.12
Female^a				1.09	1.15
Age
12	− 0.35	< 0.001	0.70	0.67	0.73
13	− 0.26	< 0.001	0.77	0.74	0.80
14	-0.22	< 0.001	0.80
15^a				0.77	0.83
Living place
Urban	0.18	< 0.001	1.20
Rural^a				1.16	1.23
Ethnic group
Han	− 0.08	.003	0.92	0.87	0.97
Minority
Father education
Middle school	0.18	< 0.001	1.20	1.140	1.26
High school	0.12	< 0.001	1.14	1.09	1.18
University^a
Brush teeth
Yes	− 0.29	< 0.001	0.75	0.71	0.79
No^a
Dental floss
Yes	− 0.20	< 0.001	0.82	0.78	0.86
No^a
Oral health knowledge
0–3	0.09	.002	1.09	1.05	1.13
4–5	0.06	.001	1.06
6–8^a				1.03	1.10

ISSN: 1472-6831