Table 3.

Adjusted Logistic Regression with the Best Goodness of Fit Estimated by the Corrected Quasi-Likelihood Information Criterion.

Explanatory Variable	Predicted Probabilitya	Odds Ratio	95% Confidence Interval	P Value	Pairwise Comparison
Base model
Frequency				0.025
(1) Annuallyb	0.53
(2) Biannually	0.61	1.33	1.04–1.71
SDF concentration				<0.001
(1) 12%b
(2) 38%		2.73	1.86–3.99
Lesion site				<0.001
(1) Mesialb
(2) Buccal		2.50	1.69–3.71
(3) Lingual		1.03	0.67–1.57
(4) Distal		1.53	1.14–2.06
(5) Occlusal		1.31	0.85–2.01
Lesion site × SDF concentration				0.001
(1.1) Mesial × 12%	0.53c
(1.2) Mesial × 38%	0.76				(1.2) > (1.1)
(2.1) Buccal × 12%	0.74
(2.2) Buccal × 38%	0.90	1.12	0.63–1.98		(2.2) > (2.1)
(3.1) Lingual × 12%	0.54
(3.2) Lingual × 38%	0.75	0.92	0.91–0.49		(3.2) > (3.1)
(4.1) Distal × 12%	0.64
(4.2) Distal × 38%	0.75	0.64	0.46–1.01		(4.2) > (4.1)
(5.1) Occlusal × 12%	0.60
(5.2) Occlusal × 38%	0.63	0.41	0.25–0.68
Tooth position				<0.001
(1) Upper anteriorb	0.53				(1) > (2), (4)
(2) Upper posterior	0.22	0.25	0.17–0.36		(3) > (2), (4)
(3) Lower anterior	0.77	2.88	1.06–7.83
(4) Lower posterior	0.24	0.27	0.19–0.40
Size of lesion				<0.001
(1) Smallb	0.53
(2) Large	0.25	0.29	0.24–0.37
Lesion with visible plaque				<0.001
(1) Yesb	0.53
(2) No	0.99	82.58	35.70–191.00
High VPI score		0.19	0.10–0.37	<0.001
Mean VPI = 0.40	0.30
Additional significant variables
Age of start brushing				0.001
(1) No brushingb	0.53				(2), (3) > (1)
(2) 12 mo or younger	0.85	4.89	1.81–13.22		(3) > (5)
(3) 13–18 mo	0.85	4.81	1.89–12.22
(4) 19–24 mo	0.78	3.06	1.20–7.85
Over 24 mo	0.78	3.02	1.20–7.55
Mother’s education				0.024
(1) Primary educationb	0.53				(1) > (2)
(2) Secondary education	0.42	0.62	0.44–0.88
(3) Postsecondary education	0.46	0.73	0.45–1.18
Main caretaker				0.030
(1) Parentsb	0.53				NS
(2) Grandparents	0.46	0.74	0.53–1.03
(3) Maid or others	0.43	0.66	0.46–0.94

NS, no significant multiple comparisons were identified; SDF, silver diamine fluoride; VPI, visible plaque index.

^aPredicted probability of arrested caries with the mean VPI score of 0.40 (after excluding missing data) and other variables as reference category.

^bReference category.

^cPredicted probability for lesion site × SDF concentration was calculated using estimates for both main and interaction effects.