Volume 28, Issue 1 (January 1983)

    Determination of Sex with a Discriminant Analysis of New Pelvic Bone Measurements: Part I

    (Received 8 May 1982; accepted 22 July 1982)

    Published Online: January

    CODEN: JFSOAD

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    Abstract

    The pelves of 100 black skeletons were measured on both sides for the following: (1) length from the superiormost aspect of the pubic symphysis to the nearest rim of the acetabulum (PS-A), (2) length from the highest point of the pubic tubercle to the nearest rim of the acetabulum (PT-A), (3) acetabular diameter (AD), (4) the vertical distance from the anterior aspect of the ischial tuberosity to the farthest rim of the acetabulum (IT-A), and (S) greatest femur head diameter. From these, three indices were derived: AD/PS-A (acetabulum/pubis index), AD/PT-A (acetabular diameter/pubic tubercle-acetabular rim index), and IT-A/PS-A (ischium-acetabulum height/pubic symphysis-acetabular rim index). The left AD/PS-A ratio and left IT-A height proved statistically to be of greatest discriminating value. Using these two variables, a discriminant function was derived which, followed by sorting with femur head diameter, accurately classified 97% of our sample.

    The acetabulum/pubis index alone with subsequent sorting by femur head diameter correctly assigned 96% of our sample. While this does not represent an improvement of predicatability over similar methods using the ischium/pubis index, measurements required for the acetabulum/pubis index are more easily defined and should, therefore, reduce the chance of observer error.


    Author Information:

    Schmidt, DJ
    Museum technician, Museum of Natural History, Smithsonian Institution, Washington, DC

    Schulter-Ellis, FP
    Assistant professor, University of Maryland School of Medicine, Baltimore, MD

    Craig, J
    Senior mathematical statistician and statistician, Smithsonian Institution, Washington, DC

    Hayek, L-A
    Senior mathematical statistician and statistician, Smithsonian Institution, Washington, DC


    Stock #: JFS12249J

    ISSN: 0022-1198

    DOI: 10.1520/JFS12249J

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    Title Determination of Sex with a Discriminant Analysis of New Pelvic Bone Measurements: Part I
    Symposium , 0000-00-00
    Committee E30