Table 4.

Multivariate negative binomial regression analysis of the potential risk factors for decayed teeth (dt) of the pre-schoolers

Variables	B	SE	Adjusted mean ratio (95% CI)	p value
Sex
Femalea
Male	0.360	0.172	1.43 (1.024–2.006)	0.036*
Number of cigarettes smoked inside the house in a day
Never smoked inside the housea
≥ 1 cigarette smoked inside the house per day	0.479	0.172	1.61 (1.153–2.260)	0.005*
Total sugar exposure
≤ 6 timesa
> 6 times	0.737	0.261	2.09 (1.253–3.483)	0.005*

AIC value = 853.49, AICC value = 854.10, BIC value = 876.37

^aReference group, B log (dt index), SE Standard Error; *p < 0.05