Identification of sex using discriminant function analysis of fingerprint ridge density at three topological areas among North Indian population

Maninder Kaur; Mankamal Kaur; Jigmath Yangchan

doi:10.2478/anre-2020-0025

Authors

Maninder Kaur Department of Anthropology, Panjab University, Chandigarh, India
Mankamal Kaur Department of Anthropology, Panjab University, Chandigarh, India
Jigmath Yangchan Department of Anthropology, Panjab University, Chandigarh, India

DOI:

https://doi.org/10.2478/anre-2020-0025

Keywords:

Distal phalanges, predictors, ridge density, sex differences

Abstract

The present study attempted to identify sex of an individual using a fingerprint ridge density at three topological areas in the North Indian population. The study population consisted of 134 males and 136 females aged 17 to 25 years (mean age 19.34±2.12). Ridge density (RD) at radial, ulnar and proximal topological areas of the distal phalanges were determined on the surface area of 25mm². Fingerprint ridge density in a defined area was significantly higher among females as compared to their male counterparts at radial, ulnar and proximal topological areas for both hands. Sexual dimorphic ratio also supported this trend for all three counting areas in right and left hands. Univariate discriminant function analysis explained that the left 2 radial (L2R) (88.1%) had the highest percentage of accuracy for sex identification, followed by the left 3 ulnar (L3U) (82.1%) and the right 2 ulnar (R2U) (81.6%). Multivariate discriminant function analysis showed that the radial topological area of the left hand was the best predictor of sex with the overall accuracy of 84.4%with following discriminant function equation −8.263 − 0.236(L1R) + + 0.321(L2R) + 0.269(L3R) + 0.268(L4R) − 0.067(L5R).

It can be inferred that ridge density in the radial topological area of left hand is the most reliable tool for identifying the sex of an individual.

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