Reliability of the lateral angle of the internal auditory canal for sex determination of subadult skeletal remains.

Abstract:

:When creating a basic biological profile, determining the sex of subadult skeletal remains is always problematic and several methods for sex determination have been proposed over time. The lateral angle of the internal auditory canal has been described as a good sex predictor in adults, and here we test its reliability for sex determination of subadults. The reliability of this method was assessed on a sample of 47 Portuguese known sex and age skeletons representing individuals from birth to 15 years of age. The lateral angle was measured on-screen using the Adobe Photoshop CS2(®) software, from photographs of bissected lateral angle casts. The measurements were performed by three different researchers in order to evaluate intra- and inter-observer variation. Our results demonstrate reasonable repeatability and replicability of the on-screen measurements. We used a 45° sectioning point to allocate individuals in the sample according to sex and attained 62.9% accuracy in sex determination using the lateral angle. When broken down by age, the least accuracy was observed for the 6-15 years-old group (54.5%) and the greatest accuracy was achieved for the 2-5 years-old (75.0%), but still low overall. The use of a sample-specific sectioning point did not improve the results. Although sexual dimorphism is statistically significant between female and male subadults, the lateral angle failed to consistently discriminate individuals according to sex.

journal_name

J Forensic Leg Med

authors

Gonçalves D,Campanacho V,Cardoso HF

doi

10.1016/j.jflm.2011.01.008

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

121-4

issue

3

eissn

1752-928X

issn

1878-7487

pii

S1752-928X(11)00014-X

journal_volume

18

pub_type

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