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Sex determination from the pubis by discriminant function analysis

Y C Luo1

  • 1Department of Oral Anatomy and Physiology, Faculty of Stomatology, Hunan Medical University Changsha, People's Republic of China.

Forensic Science International
|June 30, 1995
PubMed
Summary
This summary is machine-generated.

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Forensic anthropologists can determine sex using discriminant function analysis of four pubic bone measurements. This method achieved 100% accuracy in classifying sex from pubic bones.

Area of Science:

  • Forensic Anthropology
  • Human Osteology
  • Sex Determination

Background:

  • Accurate sex determination is crucial in forensic anthropology.
  • The human os pubis offers valuable metrics for sex estimation.
  • Previous studies have explored various skeletal elements for sex determination.

Purpose of the Study:

  • To develop and validate a discriminant function analysis model for sex determination using four specific pubic bone measurements.
  • To assess the accuracy of this model in a sample of adult human pubes.

Main Methods:

  • A total of 122 adult human pubes (66 male, 56 female) were analyzed.
  • Four quantitative measurements of the pubis were taken: superior-inferior ramus angle (X1), subpubic angle (X2), symphyseal-obturator distance (X3), and ischiopubic ramus thickness (X4).

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  • Fisher's discriminant function analysis method was applied to these measurements.

    • Main Results:

    • A discriminant function formula was derived: Y = 0.270*X1 - 0.985*X2 - 0.761*X3 + 1.806*X4.
    • The analysis achieved a statistically significant result (F = 200, P < 0.01).
    • A classification accuracy of 100% was obtained when tested on a larger dataset (230 pubes: 130 male, 100 female) using a section point of -32.47.

    Conclusions:

    • Discriminant function analysis of specific pubic bone measurements is a highly accurate method for sex determination in adult humans.
    • The established formula and section point provide a reliable tool for forensic anthropological analyses.
    • This study demonstrates the utility of the os pubis in forensic sex estimation.