Table 4.

Binary logistic regression analysis for the dental caries of first permanent molars of the surveyed children

Variables	OR	95%CI	P value
sex
Boy*
Girl	2.03	1.45–2.85	< 0.001
The only child in the family
Yes*
No	1.21	0.87–1.68	0.268
Father’s educational level
High(college or above)*
Low(senior high school or below)	1.71	1.16–2.52	0.007
Mother’s educational level
High(college or above)*
Low(senior high school or below)	1.08	0.73–1.61	0.697
Frequency of toothbrushing
≥ 2/d*
< 2/d	1.32	0.94–1.87	0.110
Sweets intake
Everyday*
Not everyday	1.02	0.58–1.79	0.942
The use of dental floss
Everyday*
Not everyday	2.51	0.61–10.32	0.203

* reference