Quantification of Pubic Symphysis Metamorphosis Based on the Analysis of Clinical MDCT Scans in a Contemporary Malaysian Population

J Forensic Sci. 2019 Nov;64(6):1803-1811. doi: 10.1111/1556-4029.14125. Epub 2019 Jul 16.

Abstract

Forensic age estimation methods are biased to sex and population; in general, accuracy is reduced when applied to foreign populations. This study assessed the accuracy of the Suchey-Brooks method in contemporary Malaysian individuals and aimed to formulate population-specific standards. Multi-detector computed tomography scans of 355 individuals (165 male; 190 female) of 15-83 years of age were reconstructed using 3D-volumetric rendering in RadiAnt. Pubic symphyseal phase, bias, inaccuracy, and percentage correct age classifications are examined. Transition analysis was used to develop age estimation standards. High observer agreement (κ = 0.763-0.832) and a positive relationship between age and pubic symphyseal phase (r = 0.884-0.90) were demonstrated. Mean inaccuracies were 8.62 and 8.95 years for males and females, respectively; overall correct classification was 97.8%. Transition ages between phases in males were 18.79, 23.29, 28.85, 43.64, and 61.15 years; in females, the corresponding data were 19.77, 22.53, 32.62, 41.85, and 57.39 years.

Keywords: Malaysia; age estimation; computed tomography; forensic anthropology; forensic science; pubic symphysis.

MeSH terms

  • Adolescent
  • Adult
  • Age Determination by Skeleton / methods*
  • Aged
  • Aged, 80 and over
  • Female
  • Forensic Anthropology
  • Humans
  • Imaging, Three-Dimensional
  • Malaysia
  • Male
  • Middle Aged
  • Multidetector Computed Tomography*
  • Observer Variation
  • Pubic Symphysis / anatomy & histology
  • Pubic Symphysis / diagnostic imaging*
  • Reproducibility of Results
  • Young Adult