Table 5.

Multivariate models based on stepwise logistic regression

Model	Treatment outcome	Predictor	Category or Unit	OR	p
				[95% CI]
Model I	CAL gain	Defect morphology	Number of walls	8.09	0.006
				[1.83–35.69]
Model II	Change in bone density in subtraction at 12 months (compared to baseline)	Radiographic angle	1 degree	0.67	0.033
				[0.47–0.97]
Model III	Change in bone density in subtraction at 12 months (compared to 6 months)	Radiographic defect depth	1 mm	2.33	0.025
				[1.11–4.90]

CAL clinical attachment level