Table 2.

Evaluation of the effectiveness of the treatments for arrest of decay

Group	Success				Failure				Total				P value		RR (95.0% CI)
	6 months		12 months		6 months		12 months		6 months		12 months		6 months	12 months	6 months	12 months
	n	%	n	%	n	%	n	%	n	%	n	%
SDF	155	84.7	113	66.9	28	15.3	56	33.1	183	100.0	169	100.0	<0.001*	<0.001*	1.59 (1.36–1.87)	1.73 (1.38–2.18)
IRT	86	53.1	59	38.6	76	46.9	94	61.4	162	100.0	153	100.0
Total group	241	69.9	172	53.0	104	30.1	150	46.6	345	100.0	322	100.0

CI, confidence interval; IRT, interim restorative treatment; SDF, silver diamine fluoride.

^*P values obtained by Pearson’s chi-squared test.