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International Journal of Legal Medicine

, Volume 133, Issue 4, pp 1177–1189 | Cite as

BioAlder: a tool for assessing chronological age based on two radiological methods

  • Øyvind BlekaEmail author
  • Veslemøy Rolseth
  • Pål Skage Dahlberg
  • Antoine Saadé
  • Marianne Saadé
  • Liliana Bachs
Original Article

Abstract

We have created the tool BioAlder as an age prediction model based on the systems Greulich and Pyle (hand) and the Demirjian’s grading of the third molar tooth. The model compiles information from studies representing a total of 17,151 individuals from several parts of the world. The model offers a solution where issues as group-wise data format and age mimicry bias are bypassed. The model also provides a solution for combining the two grading systems, hand and tooth, to one combined age prediction result assuming independency. We have tested our model of age prediction and the independency assumption on a separate data set from Lebanon with 254 young individuals. The prediction intervals of BioAlder covered most of the data points; however, we observed some outliers. Our analyses indicate at least a weak dependency between the two methods.

Keywords

Age estimation Demirjian’s Greulich and Pyle Conditional dependency 

Notes

Acknowledgments

We thank Jayakumar Jayaraman, Simon Camilleri, Rick R. van Rijn, Eugénia Cunha, Abdul Mueed Zafar, Bernhard Knell, and Ivan Galić for providing data, and Thore Egeland and Torbjørn Wisløff for useful discussions. We also want to thank the reviewers for their useful comments.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Forensic SciencesOslo University HospitalOsloNorway
  2. 2.Department of Orthodontics and Dento-Facial OrthopedicsLebanese UniversityBeirutLebanon
  3. 3.Faculty of Dental MedicineSaint-Joseph UniversityBeirutLebanon

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