The effectiveness of topical fluoride agents on preventing development of approximal caries in primary teeth: a randomized clinical trial

Table 4 Final Multi-level Logistic Regression Model of the Caries Development Rate at 18-month Follow-up

Variables	Adjusted odds ratio^{a, b}	95% CI	P Value
Group			0.371
38% SDF	1.12	0.52–2.42	0.774
5% NaF	0.63	0.28–1.44	0.273
Placebo control	1		-
Tooth type			0.005
Second molar	1.11	0.93–1.32	0.231
First molar	1.20	1.07–1.36	0.003
Canine	1
Baseline x-ray			< 0.001
RA3	6.82	4.15–11.19	< 0.001
RA2	3.02	1.79–5.08	< 0.001
RA1	1.50	1.01–2.21	0.043
Sound	1

^a excluded non-significant variables: baseline demographic variables (child’s gender, main caregiver, education level of parents, and monthly family income), oral health-related habits (brushing habit, use of fluoride tooth paste, drinking sugary milk, bottle feeding habit, and frequency of snack taking), and baseline clinical characteristics (dmfs, plaque index, tooth surface type, presence of food impaction at the approximal area and contact characteristics). ^b Adjusted odds ratio > 1 corresponds to a higher chance of approximal caries development

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