The predictive performance of surgical treatment in upper molars with combined bony defect and furcation involvement: a retrospective cohort study

Table 2 Univariate logistic regression to evaluate possible factors related to failure

Variable	Estimate	Standard error	Odd ratio	95% CI	p value
Group—reference: Deg.1(−)
Deg.1(+)	0.087	1.294	1.091	− 2.449, 2.623	0.946
Deg.2(−)	0.799	1.249	2.222	− 1.650, 3.247	0.523
Deg.2(+)	0.693	1.225	2.000	− 1.707, 3.094	0.571
Grade—reference: Grade B
Grade C	0.223	0.785	1.250	− 1.316, 1.762	0.776
Horizontal furcation—reference: horizontal furcation involvement degree 1
Degree 2	0.675	0.675	1.964	− 0.647, 1.997	0.317
Vertical furcation—reference: vertical furcation subclassification A
Subclass B	0.827	0.680	2.286	− 0.506, 2.159	0.224
Subclass C	0.827	1.009	2.286	− 1.151, 2.804	0.413
Baseline pocket depth
	0.491	0.233	1.634	0.035, 0.947	0.035*

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