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Journal of Indian Academy of Forensic Medicine
Year : 2014, Volume : 36, Issue : 4
First page : ( 381) Last page : ( 386)
Print ISSN : 0971-0973. Online ISSN : 0974-0848.

Sex Determination Using Fingerprint Ridge Density In South Indian Population

Sam Nithin Mathew1,*, Rema P2, Nair B Venugopalan3

1Junior Consultant, Dept. of Forensic Medicine, District Hospital, Thrissur, Kerala, India - 680001

2Prof & HOD, Dept. of Forensic Medicine, Medical College, Alappuzha, Kerala

3Former Deputy Director, State Fingerprint Bureau, Kerala Police

*Corresponding Author E-mail: drnithinmathewsam@yahoo.co.in

Online published on 2 December, 2014.

Abstract

Determination of sex is vital in establishing the identity of human remains and has always been a challenge for forensic pathologists, particularly when a fingerprint recovered from crime scene does not match with any of those available in the records. The present study was conducted on 100 males and 100 females of South Indian Population, aged between 18 and 81 years, to study the possibility of differentiation of gender using fingerprint ridge density. For calculating the finger print ridge density, the upper portion of the radial border of each print was chosen and the epidermal ridges in a defined area counted. Results show that women have a significantly higher fingerprint ridge density than men. Application of Baye's theorem suggests that a fingerprint having ridge density of <14/25mm2 is more likely to be that of a male, and one having ridge density of >14/25mm2 is more likely to be that of a female. Discriminant analysis on the study data could derive formulae to predict the sex using fingerprint ridge density. The results show that fingerprint ridge density can be used as a tool for sex determination.

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Keywords

Fingerprint, Ridge density, Baye's theorem, Discriminant analysis, Sex determination.

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