Table 2. Multivariable Results of Factors Associated With Time to Having Approximal Caries Using Cox PH Modeling^*.

Types of contact	Total contacts at 36 months (N=3,848)		Hazard ratio (95% CI)	P-value
Types of contact	Absence of caries N (%)	Presence of caries N (%)	Hazard ratio (95% CI)	P-value
O (257)	254 (98.8)	3 (1.2)	1
X (148)	145 (98.0)	3 (2.0)	2.5 (0.5-12.6)	0.253
I (2778)	2450 (88.2)	328 (11.8)	15.3 (4.9-47.5)	<0.001
S (665)	501 (75.2)	165 (24.8)	25.9 (8.3-81.2)	<0.001

Abbreviations used in this table: O=open contact; X=point contact; I=straight contact; S=curved contact; CI=confidence interval.

Table 2. Multivariable Results of Factors Associated With Time to Having Approximal Caries Using Cox PH Modeling*.