Table 4 Chronological age predicted by the Demirjian and Nolla methods for males and females
Sex | Demirjian | Nolla | |||||||
|---|---|---|---|---|---|---|---|---|---|
B | SE B | β | t | B | SE B | β | t | ||
1) Male | Constant | -135.03 | 13.23 | -10.20*** | -186.28 | 11.14 | -16.73*** | ||
Predictor | 3.10 | 0.15 | .73 | 21.46*** | 5.36 | 0.18 | .83 | 30.13*** | |
R = .729, R2 = .531, SEE = 2.89 | R = .831, R2 = .690, SEE = 2.35 | ||||||||
F(1,410) = 460.63, p < .001 | F(1,407) = 907.54, p < .001 | ||||||||
95% confidence interval for B: .235 to .282 | 95% confidence interval for B: .418 to .476 | ||||||||
Demirjian’s formula (male): Predicted chron. age = -135.03 + 3.10 x Demirjian’s score | Nolla’s formula (male): Predicted chron. age = -186.28 + 5.36 x Nolla’s score | ||||||||
2) Female | Constant | -225.68 | 21.25 | -10.62*** | -248.36 | 15.89 | -15.63*** | ||
Predictor | 4.05 | 0.26 | .67 | 18.01*** | 6.32 | 0.25 | .78 | 25.53*** | |
R = .665, R2 = .442,SEE = 3.58 | R = .783, R2 = .614, SEE = 2.99 | ||||||||
F(1,410) = 324.50, p < .001 | F(1,410) = 651.59, p < .001 | ||||||||
95% confidence interval for B: .301 to .374 | 95% confidence interval for B: .486 to .567 | ||||||||
Demirjian’s formula (female): Predicted chron. age = -225.68 + 4.05 x Demirjian’s score | Nolla’s formula (female): Predicted chron. age = -248.36 + 6.32 x Nolla’s score | ||||||||