Sex determination based on a thoracic vertebra and ribs evaluation using clinical chest radiography

Shun Tsubaki, Junji Morishita, Yosuke Usumoto, Kyoko Sakaguchi, Yusuke Matsunobu, Yusuke Kawazoe, Miki Okumura, Noriaki Ikeda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Our aim was to investigate whether sex can be determined from a combination of geometric features obtained from the 10th thoracic vertebra, 6th rib, and 7th rib. Six hundred chest radiographs (300 males and 300 females) were randomly selected to include patients of six age groups (20s, 30s, 40s, 50s, 60s, and 70s). Each group included 100 images (50 males and 50 females). A total of 14 features, including 7 lengths, 5 indices for the vertebra, and 2 types of widths for ribs, were utilized and analyzed for sex determination. Dominant features contributing to sex determination were selected by stepwise discriminant analysis after checking the variance inflation factors for multicollinearity. The accuracy of sex determination using a combination of the vertebra and ribs was evaluated from the selected features by the stepwise discriminant analysis. The accuracies in each age group were also evaluated in this study. The accuracy of sex determination based on a combination of features of the vertebra and ribs was 88.8% (533/600). This performance was superior to that of the vertebra or ribs only. Moreover, sex determination of subjects in their 20s demonstrated the highest accuracy (96.0%, 96/100). The features selected in the stepwise discriminant analysis included some features in both the vertebra and ribs. These results indicate the usefulness of combined information obtained from the vertebra and ribs for sex determination. We conclude that a combination of geometric characteristics obtained from the vertebra and ribs could be useful for determining sex.

Original languageEnglish
Pages (from-to)19-24
Number of pages6
JournalLegal Medicine
Volume27
DOIs
Publication statusPublished - Jul 2017

Fingerprint

Thoracic Vertebrae
Ribs
Radiography
Thorax
Spine
Discriminant Analysis
Age Groups
Economic Inflation

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine
  • Issues, ethics and legal aspects

Cite this

Sex determination based on a thoracic vertebra and ribs evaluation using clinical chest radiography. / Tsubaki, Shun; Morishita, Junji; Usumoto, Yosuke; Sakaguchi, Kyoko; Matsunobu, Yusuke; Kawazoe, Yusuke; Okumura, Miki; Ikeda, Noriaki.

In: Legal Medicine, Vol. 27, 07.2017, p. 19-24.

Research output: Contribution to journalArticle

Tsubaki, Shun ; Morishita, Junji ; Usumoto, Yosuke ; Sakaguchi, Kyoko ; Matsunobu, Yusuke ; Kawazoe, Yusuke ; Okumura, Miki ; Ikeda, Noriaki. / Sex determination based on a thoracic vertebra and ribs evaluation using clinical chest radiography. In: Legal Medicine. 2017 ; Vol. 27. pp. 19-24.
@article{c6cad70095f045de9c7cd91b832b17af,
title = "Sex determination based on a thoracic vertebra and ribs evaluation using clinical chest radiography",
abstract = "Our aim was to investigate whether sex can be determined from a combination of geometric features obtained from the 10th thoracic vertebra, 6th rib, and 7th rib. Six hundred chest radiographs (300 males and 300 females) were randomly selected to include patients of six age groups (20s, 30s, 40s, 50s, 60s, and 70s). Each group included 100 images (50 males and 50 females). A total of 14 features, including 7 lengths, 5 indices for the vertebra, and 2 types of widths for ribs, were utilized and analyzed for sex determination. Dominant features contributing to sex determination were selected by stepwise discriminant analysis after checking the variance inflation factors for multicollinearity. The accuracy of sex determination using a combination of the vertebra and ribs was evaluated from the selected features by the stepwise discriminant analysis. The accuracies in each age group were also evaluated in this study. The accuracy of sex determination based on a combination of features of the vertebra and ribs was 88.8{\%} (533/600). This performance was superior to that of the vertebra or ribs only. Moreover, sex determination of subjects in their 20s demonstrated the highest accuracy (96.0{\%}, 96/100). The features selected in the stepwise discriminant analysis included some features in both the vertebra and ribs. These results indicate the usefulness of combined information obtained from the vertebra and ribs for sex determination. We conclude that a combination of geometric characteristics obtained from the vertebra and ribs could be useful for determining sex.",
author = "Shun Tsubaki and Junji Morishita and Yosuke Usumoto and Kyoko Sakaguchi and Yusuke Matsunobu and Yusuke Kawazoe and Miki Okumura and Noriaki Ikeda",
year = "2017",
month = "7",
doi = "10.1016/j.legalmed.2017.06.003",
language = "English",
volume = "27",
pages = "19--24",
journal = "Legal Medicine",
issn = "1344-6223",
publisher = "Elsevier",

}

TY - JOUR

T1 - Sex determination based on a thoracic vertebra and ribs evaluation using clinical chest radiography

AU - Tsubaki, Shun

AU - Morishita, Junji

AU - Usumoto, Yosuke

AU - Sakaguchi, Kyoko

AU - Matsunobu, Yusuke

AU - Kawazoe, Yusuke

AU - Okumura, Miki

AU - Ikeda, Noriaki

PY - 2017/7

Y1 - 2017/7

N2 - Our aim was to investigate whether sex can be determined from a combination of geometric features obtained from the 10th thoracic vertebra, 6th rib, and 7th rib. Six hundred chest radiographs (300 males and 300 females) were randomly selected to include patients of six age groups (20s, 30s, 40s, 50s, 60s, and 70s). Each group included 100 images (50 males and 50 females). A total of 14 features, including 7 lengths, 5 indices for the vertebra, and 2 types of widths for ribs, were utilized and analyzed for sex determination. Dominant features contributing to sex determination were selected by stepwise discriminant analysis after checking the variance inflation factors for multicollinearity. The accuracy of sex determination using a combination of the vertebra and ribs was evaluated from the selected features by the stepwise discriminant analysis. The accuracies in each age group were also evaluated in this study. The accuracy of sex determination based on a combination of features of the vertebra and ribs was 88.8% (533/600). This performance was superior to that of the vertebra or ribs only. Moreover, sex determination of subjects in their 20s demonstrated the highest accuracy (96.0%, 96/100). The features selected in the stepwise discriminant analysis included some features in both the vertebra and ribs. These results indicate the usefulness of combined information obtained from the vertebra and ribs for sex determination. We conclude that a combination of geometric characteristics obtained from the vertebra and ribs could be useful for determining sex.

AB - Our aim was to investigate whether sex can be determined from a combination of geometric features obtained from the 10th thoracic vertebra, 6th rib, and 7th rib. Six hundred chest radiographs (300 males and 300 females) were randomly selected to include patients of six age groups (20s, 30s, 40s, 50s, 60s, and 70s). Each group included 100 images (50 males and 50 females). A total of 14 features, including 7 lengths, 5 indices for the vertebra, and 2 types of widths for ribs, were utilized and analyzed for sex determination. Dominant features contributing to sex determination were selected by stepwise discriminant analysis after checking the variance inflation factors for multicollinearity. The accuracy of sex determination using a combination of the vertebra and ribs was evaluated from the selected features by the stepwise discriminant analysis. The accuracies in each age group were also evaluated in this study. The accuracy of sex determination based on a combination of features of the vertebra and ribs was 88.8% (533/600). This performance was superior to that of the vertebra or ribs only. Moreover, sex determination of subjects in their 20s demonstrated the highest accuracy (96.0%, 96/100). The features selected in the stepwise discriminant analysis included some features in both the vertebra and ribs. These results indicate the usefulness of combined information obtained from the vertebra and ribs for sex determination. We conclude that a combination of geometric characteristics obtained from the vertebra and ribs could be useful for determining sex.

UR - http://www.scopus.com/inward/record.url?scp=85021428813&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85021428813&partnerID=8YFLogxK

U2 - 10.1016/j.legalmed.2017.06.003

DO - 10.1016/j.legalmed.2017.06.003

M3 - Article

C2 - 28668479

AN - SCOPUS:85021428813

VL - 27

SP - 19

EP - 24

JO - Legal Medicine

JF - Legal Medicine

SN - 1344-6223

ER -