Table 5. Regression models demonstrating the relationship of FBT with gingival recession.

Factors		Univariate model			Multivariate model
		Standardized coefficient β	95% CI	P	Standardized coefficient β	95% CI	P
Patient-related factors
	Age	−0.062	−0.011 to 0.003	0.244	−0.071	−0.011 to 0.002	0.176
	Sex	0.048	−0.076 to 0.205	0.368	−0.011	−0.164 to 0.134	0.839
Tooth-related factors
	Jaw of the tooth	−0.009	−0.128 to 0.107	0.862	0.026	−0.115 to 0.173	0.692
	Position of the tooth	−0.086	−0.214 to 0.020	0.104	−0.084	−0.211 to 0.021	0.109
Periodontal factors
	IBT	−0.033	−0.245 to 0.127	0.536	−0.016	−0.265 to 0.208	0.815
Orthodontic factors
	Orthognathic surgery history	0.051	−0.059 to 0.175	0.331	0.041	−0.073 to 0.166	0.442
	Inclination of the tooth	0.202	0.007 to 0.021	<0.001a)	0.229	0.005 to 0.027	0.005a)
	Rotation of the tooth	0.080	−0.002 to 0.012	0.131	0.103	0.000 to 0.014	0.053

FBT: final labial alveolar bone thickness, CI: confidence interval, IBT: initial labial alveolar bone thickness.

^a)Statistically significant difference (P<0.05).