Age-group | Demirjian | Age-group | Nolla | |||||||
---|---|---|---|---|---|---|---|---|---|---|
B | SE B | β | t | B | SE B | β | t | |||
4 to 8 years | Constant | 2.23 | 0.52 | 4.31*** | 4 to 10 years | -3.49 | 0.58 | -5.99*** | ||
Predictor | 0.06 | 0.01 | .74 | 9.33*** | 0.21 | 0.01 | .85 | 20.66*** | ||
R = .742, R2 = .551, SEE = 0.67 | R = .852, R2 = .726, SEE = 0.81 | |||||||||
F(1,71) = 87.05, p < .001 | F(1,161) = 417.78, p < .001 | |||||||||
95% confidence interval for B: .045 to .074 | 95% confidence interval for B: .191 to .232 | |||||||||
Predicted chron. age = 2.23 + 0. 06 x Demirjian’s score | Predicted chron. age = -3.49 + 0.21 x Nolla’s score | |||||||||
9 to 14 years | Constant | -20.66 | 2.17 | -9.51*** | 11 to 15 years | -14.18 | 2.42 | -5.85*** | ||
Predictor | 0.33 | 0.02 | .72 | 14.72*** | 0.40 | 0.04 | .69 | 11.18*** | ||
R = .715, R2 = .511, SEE = 1.17 | R = .689, R2 = .475, SEE = 1.00 | |||||||||
F(1,207) = 216.71, p< .001 | F(1,138) = 124.95, p < .001 | |||||||||
95% confidence interval for B: .288 to .376 | 95% confidence interval for B: .330 to .472 | |||||||||
Predicted chron. age = -20.66 + 0.33 x Demirjian’s score | Predicted chron. age = -14.18 + 0.40 x Nolla’s score | |||||||||
15 to 18 years | Constant | -103.39 | 32.59 | -3.17** | 16 to 19 years | -4.85 | 15.33 | -0.32 | ||
Predictor | 1.20 | 0.33 | .42 | 3.66** | 0.32 | 0.22 | 0.192 | 1.44 | ||
R = .422, R2 = .178, SEE = 0.97 | R = .192, R2 = .037, SEE = 1.25 | |||||||||
F(1,62) = 13.44, p = .001 | F(1,54) = 2.07, p = .156 | |||||||||
95% confidence interval for B: .608 to 1.79 | 95% confidence interval for B: -.125 to .759 | |||||||||
Predicted chron. age = -103.39 + 1.20 x Demirjian’s score | (Nolla method not statistically significant, p > .05) |