Table 4.

Multiple linear regression of size on age, number of missing third molars, and sex, performed on subsamples with no third molar agenesis or agenesis only in the maxilla or only in the mandible.

Size Configurations *	Parameter	β-Coefficient	95% CI
			Lower Bound	Upper Bound	p-Value
Individuals with third molar agenesis only in the maxilla (N = 37) and no agenesis (N = 310)
Maxilla	Intercept	4.957	4.940	4.973	<0.001
	Age	0.005	0.004	0.006	<0.001
	Sex	0.026	0.015	0.036	<0.001
	Number of missing third molars	−0.010	−0.020	0	0.048
Mandible	Intercept	5.231	5.213	5.249	<0.001
	Age	0.006	0.005	0.007	<0.001
	Sex	0.039	0.027	0.051	<0.001
	Number of missing third molars	−0.007	−0.018	0.004	0.219
Individuals with third molar agenesis only in the mandible (N = 49) and no agenesis (N = 310)
Maxilla	Intercept	4.959	4.943	4.974	<0.001
	Age	0.004	0.003	0.005	<0.001
	Sex	0.026	0.015	0.036	<0.001
	Number of missing third molars	−0.018	−0.026	−0.011	<0.001
Mandible	Intercept	5.236	5.219	5.253	<0.001
	Age	0.006	0.005	0.007	<0.001
	Sex	0.038	0.026	0.050	<0.001
	Number of missing third molars	−0.021	−0.030	−0.013	<0.001

* ln(Cs).