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Table 4 Saudi Arabian specific regression coefficients for males and females separately obtained from a fit of the model on the full Saudi Arabian dataset according to the Willems BC method (2001)

From: Age estimation based on Willems method versus country specific model in Saudi Arabia children and adolescents

  Tooth B C D E F G H
M 31 6.141 4.656 5.847 5.383 5.874 5.556
32 0.000 0.000 − 0.702 − 0.226 0.083 0.562
33 0.000 0.213 0.633 1.244 1.518 1.763
34 0.011 1.189 1.162 0.638 0.974 2.475 2.707
35 -0.293 − 0.390 − 0.456 0.214 0.399 0.612 2.147
36 0.000 − 1.486 − 1.252 − 1.130 − 0.413 − 0.198
37 0.160 0.522 0.992 1.514 1.872 2.555 3.654
F 31 11.204 11.403 12.426 12.948 11.855
32 0.000 − 0.084 0.000 − 0.601 − 0.349 0.165
33 0.000 -4.567 − 5.126 − 5.176 − 4.347 − 3.385 − 3.024
34 0.000 0.000 0.279 0.308 0.412 0.886 1.976
35 − 1.355 -0.376 − 0.869 − 0.513 − 0.325 − 0.103 1.999
36 0.000 0.000 − 0.300 0.032 0.266 0.661
37 − 0.095 − 0.221 0.134 0.589 0.503 0.899 2.578
  1. M: male; F: Female