The accuracy of estimating chronological age from Demirjian and Nolla methods in a Portuguese and Spanish sample

Table 2 Simple regression analysis of chronological age predicted by the Nolla and Demirjian scores

Model	Demirjian				Nolla
	B	SE B	β	t	B	SE B	β	t
(Constant)	−168.01	11.80		−14.24***	−213.39	9.52		−22.42***
Predictor	3.45	0.13	.69	27.22***	5.78	0.15	.80	38.53***
R = .689, R ² = .475, SEE = 3.28					R = .803, R ² = .644, SEE = 2.70
F(1,819) = 740.64, p < .001					F(1,819) = 1484.29, p < .001
95% confidence interval for B: .267 to .308					95% confidence interval for B: .457 to .507
Equations forecasting chronological age through the significant teeth:
Demirjian’s formula (global score):					Nolla’s formula (global score):
Predicted chron. age = −168.01 + 3.45 × Demirjian’s score					Predicted chron. age = −213.39+ 5.78 × Nolla’s score