Table 6.

Hierarchical multiple regression analysis for evaluation of the predictors of satisfaction with smile aesthetics assessed using the Smile Aesthetics Satisfaction Scale (SASS)

Model	Predictor variable	Unstandardised coefficients B	SE	Standardised coefficients beta	Significance	Correlations
						Zero-order	Partial	Part
1	(Constant)	11.891	0.145
	Crowding	−0.939	0.237	−0.151	<0.001	−0.151	−0.151	−0.151
2	(Constant)	12.233	0.156
	Crowding	−0.969	0.233	−0.156	<0.001	−0.151	−0.159	−0.156
	Fracture	−1.360	0.262	−0.194	<0.001	−0.190	−0.197	−0.194
3	(Constant)	12.370	0.157
	Crowding	−0.893	0.230	−0.144	<0.001	−0.151	−0.148	−0.143
	Fracture	−1.278	0.260	−0.183	<0.001	−0.190	−0.187	−0.182
	Self-reported gingivitis	−1.485	0.337	−0.164	<0.001	−0.187	−0.168	−0.163
4	(Constant)	12.034	0.171
	Crowding	−1.064	0.230	−0.171	<0.001	−0.151	−0.177	−0.169
	Fracture	−1.206	0.256	−0.172	<0.001	−0.190	−0.180	−0.172
	Self-reported gingivitis	−1.320	0.334	−0.146	<0.001	−0.187	−0.152	−0.144
	Intact teeth	1.123	0.238	0.175	<0.001	0.175	0.180	0.172
5	(Constant)	15.243	0.699
	Crowding	−1.155	0.227	−0.186	<0.001	−0.151	−0.194	−0.182
	Fracture	−1.023	0.255	−0.146	<0.001	−0.190	−0.154	−0.144
	Self-reported gingivitis	−1.143	0.331	−0.126	0.001	−0.187	−0.133	−0.124
	Intact teeth	0.921	0.239	0.143	<0.001	0.175	0.148	0.138
	Chroma	−0.164	0.035	−0.177	<0.001	−0.229	−0.180	−0.169
6	(Constant)	14.164	0.806
	Crowding (0 = no; 1 = yes)	−1.170	0.226	−0.188	<0.001	−0.151	−0.197	−0.185
	Fracture (0 = absent; 1 = visible)	−1.046	0.254	−0.150	<0.001	−0.190	−0.158	−0.147
	Self-reported gingivitis (0 = never/rarely; 1 = often/always)	−1.211	0.330	−0.134	<0.001	−0.187	−0.141	−0.131
	Intact teeth (0 = restorations; 1 = intact)	0.888	0.238	0.138	<0.001	0.175	0.143	0.133
	Chroma	−0.161	0.035	−0.174	<0.001	−0.229	−0.178	−0.166
	Visibility of 11 when smiling (ratio)	1.357	0.511	0.095	0.008	0.089	0.103	0.095

1. R = 0.151; R-square = 0.023; adjusted R-square = 0.021; P < 0.001.

2. R = 0.246; R-square = 0.061; adjusted R-square = 0.058; P < 0.001; ΔR-square = 0.038; P < 0.001.

3. R = 0.295; R-square = 0.087; adjusted R-square = 0.083; P < 0.001; ΔR-square = 0.027; P < 0.001.

4. R = 0.342; R-square = 0.117; adjusted R-square = 0.111; P < 0.001; ΔR-square = 0.029; P < 0.001.

5. R = 0.381; R-square = 0.145; adjusted R-square = 0.139; P < 0.001; ΔR-square = 0.029; P < 0.001.

6. R = 0.393; R-square = 0.154; adjusted R-square = 0.147; P < 0.001; ΔR-square = 0.009; P = 0.008.