Table 4. Regression models demonstrating the relationship of FGT 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	−0.073	−0.011 to 0.002	0.161
	Sex	0.048	−0.076 to 0.205	0.368	−0.014	−0.166 to 0.129	0.803
Tooth-related factors
	Jaw of the tooth	−0.009	−0.128 to 0.107	0.862	0.011	−0.110 to 0.134	0.847
	Position of the tooth	−0.086	−0.214 to 0.020	0.104	−0.085	−0.211 to 0.019	0.100
Periodontal factors
	IGT	−0.002	−0.204 to 0.197	0.976	0.021	−0.167 to 0.250	0.698
Orthodontic factors
	Orthognathic surgery history	0.051	−0.059 to 0.175	0.331	0.044	−0.070 to 0.169	0.419
	Inclination of the tooth	0.202	0.007 to 0.021	<0.001a)	0.232	0.005 to 0.027	0.004a)
	Rotation of the tooth	0.080	−0.002 to 0.012	0.131	0.101	0.000 to 0.014	0.056

FGT: final labial gingival thickness, CI: confidence interval, IGT: initial labial gingival thickness.

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