A Method for Estimating Sex Using Metric Analysis of the Scapula *

Abstract:  The most accurate and precise methods for the assessment of age and stature often require knowledge of sex. Thus, being able to correctly identify sex from skeletal remains is critical in the forensic context. The presence of the os coxae or skull can never be guaranteed, making the development of reliable methods of sex estimation using other skeletal elements necessary. Using a 724 individual calibration sample from the Hamann‐Todd collection, this study identifies sexual dimorphism in the human scapula, and presents a new five‐variable discriminant function for sex estimation. The overall accuracy of this method proved to be 95.7% on the cross‐validated calibration sample, 92.5% on an 80 individual test sample from the Hamann‐Todd collection, and 84.4% on a 32 individual test sample from the skeletal collection of the Wichita State University Biological Anthropology Laboratory. Additionally, a slightly less accurate two‐variable model was developed and has cross‐validated accuracy of 91.3%.

[1]  W. Scheidt.  Lehrbuch der Anthropologie , 1948 .

[2]  G. Dabbs.  Is Dwight Right? Can the Maximum Height of the Scapula Be Used for Accurate Sex Estimation? * , 2009, Journal of forensic sciences.

[3]  Steven N. Byers,et al.  Introduction to Forensic Anthropology , 2007 .

[4]  M Y Işcan,et al.  Sex determination from the femur and tibia in South African whites. , 1997, Forensic science international.

[5]  M. Bidmos,et al.  Patella measurements of South African whites as sex assessors. , 2005, Homo : internationale Zeitschrift fur die vergleichende Forschung am Menschen.

[6]  I. Hershkovitz,et al.  Sacroiliac Joint Bridging: Simple and Reliable Criteria for Sexing the Skeleton , 2006, Journal of forensic sciences.

[7]  M. Işcan,et al.  Determination of sex from the tibia. , 1984, American journal of physical anthropology.

[8]  D H Ubelaker,et al.  Sex estimation from the metatarsals. , 1997, Journal of forensic sciences.

[9]  A M C Murphy.  The calcaneus: sex assessment of prehistoric New Zealand Polynesian skeletal remains. , 2002, Forensic science international.

[10]  E. Güleç,et al.  Sex determination using the scapula in medieval skeletons from East Anatolia. , 2006, Collegium antropologicum.

[11]  C. Armstrong,et al.  ESTIMATING SEX OF MAYA SKELETONS BY DISCRIMINANT FUNCTION ANALYSIS OF LONG-BONE MEASUREMENTS FROM THE PROTOHISTORIC MAYA SITE OF TIPU, BELIZE , 2002, Ancient Mesoamerica.

[12]  M Y Işcan,et al.  Sexual dimorphism in the humerus: a comparative analysis of Chinese, Japanese and Thais. , 1998, Forensic science international.

[13]  W. Bass.  Human osteology : a laboratory and field manual of the human skeleton , 1971 .

[14]  Ruma Purkait,et al.  A study of sexual variation in Indian femur. , 2004, Forensic science international.

[15]  D. Ubelaker,et al.  Standards for Data Collection from Human Skeletal Remains , 1994 .

[16]  R. Dongen.  THE SHOULDER GIRDLE AND HUMERUS OF THE AUSTRALIAN ABORIGINE. , 1963 .

[17]  R. Penning,et al.  [Sexual dimorphism of the scapula]. , 1988, Zeitschrift fur Rechtsmedizin. Journal of legal medicine.

[18]  Mubarak Ariyo Bidmos,et al.  Sex Determination From the Talus of South African Whites by Discriminant Function Analysis , 2003, The American journal of forensic medicine and pathology.

[19]  A. Prescher,et al.  Does the area of the glenoid cavity of the scapula show sexual dimorphism? , 1995, Journal of anatomy.

[20]  Thomas Dwight,et al.  The Range and Significance of Variation in the Human Skeleton: The Shattuck Lecture for 1894 , 1894 .

[21]  Luis Ríos Frutos.  Determination of sex from the clavicle and scapula in a Guatemalan contemporary rural indigenous population. , 2002, The American journal of forensic medicine and pathology.

[22]  M Y Işcan,et al.  Sex determination from the tibia: standards for contemporary Japan. , 1994, Journal of forensic sciences.

[23]  A. Murphy.  Articular surfaces of the pectoral girdle: sex assessment of prehistoric New Zealand Polynesian skeletal remains. , 2002, Forensic science international.

[24]  Mubarak Ariyo Bidmos,et al.  Sexual dimorphism of the calcaneus of South African blacks. , 2004, Journal of forensic sciences.

[25]  John Albanese,et al.  A metric method for sex determination using the hipbone and the femur. , 2003, Journal of forensic sciences.

[26]  K. Sakaue.  Sexual determination of long bones in recent Japanese , 2004 .

[27]  F Introna,et al.  Sex determination by discriminant analysis of patella measurements. , 1998, Forensic science international.

[28]  A. Malgosa,et al.  Sex assessment on the basis of long bone circumference. , 2000, American journal of physical anthropology.

[29]  R. Biritwum,et al.  Osteometric analysis of sexual dimorphism in the sternal end of the rib in a west African population. , 1999, Journal of forensic sciences.

[30]  A M C Murphy.  The talus: sex assessment of prehistoric New Zealand Polynesian skeletal remains. , 2002, Forensic science international.

[31]  R. Purkait,et al.  Sexual Dimorphism in Femora: An Indian Study , 2002 .

[32]  M Graw,et al.  Determination of sex from femora. , 2000, Forensic science international.

[33]  R. Purkait.  Measurements of ulna--a new method for determination of sex. , 2001, Journal of forensic sciences.

[34]  D. R. Bainbridge,et al.  Study of Sex Differences in the Scapula , 1956 .

[35]  Phillip L Walker,et al.  Greater sciatic notch morphology: sex, age, and population differences. , 2005, American journal of physical anthropology.

[36]  E. González‐Reimers,et al.  Sex determination by discriminant function analysis of the right tibia in the prehispanic population of the Canary Islands. , 2000, Forensic science international.

[37]  Thomas Dwight.  The Range and Significance of Variation in the Human Skeleton , 2010 .