Sex differences from fingerprint ridge density in the Indian population

Nayak, Vinod C; Rastogi, Prateek; Kanchan, Tanuj; Lobo, Stany W.; Yoganarasimha, K.; Nayak, Smitha; Rao, Nageshkumar; Kumar, G. Pradeep; Shetty, B. Suresh Kumar; Menezes, Ritesh G.

doi:10.1016/j.jflm.2009.09.002

Cited by 60 publications

(48 citation statements)

References 11 publications

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“…Our result is concordant to Gutierrez-Redomero et al [12] which have been reported that female have higher RD than male when older than 12 years, but not when younger. Table 4 shows variability of means RD across various populations [4][5][6][7][13][14] including Thai adults [15] and Amerindian ethnic adolescents [16]. Females possess RDs statistically greater than those of males in any population except for Amerindian children [16].…”

Section: Resultsmentioning

confidence: 99%

Variability of Finger Ridge Density among Thai Adolescents

Nanakorn¹,

Kutanan²

2012

J Forensic Res

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Finger ridge density (RD) is the number of finger ridges that touch the diagonal line drawn between a square of 25 mm 2 which is placed on the core of the fingerprint image. It has been useful as a sex determination aid in forensic practice as its values are significantly higher in females than males. The present study was aimed at investigating the RD of Thai adolescents aged between 10 and 12 years old. Subjects were 130 schoolboys and 130 schoolgirls were randomly selected and signed informed consent forms prior to printing each individual's ten fingers by using the adhesive transparent tape technique. The Microsoft Word program was applied for precise counting of RD. The mean RD differences between left and right hands, boys and girls, radial and ulnar areas were statistically tested. The likelihood ratio was computed to obtain the probability inferences of sex, and posterior probabilities were estimated using Bayes' theorem. Results revealed as follows: (1) The mean RDs (ridges per 25 mm 2 ) of boys and girls were not significantly different across the radial (15.89 vs. 16.19, respectively) and ulnar areas (15.84 vs. 16.00, respectively). For each sex, mean RDs in the radial and the ulnar were not statistically different. (2) The mean RDs in both sexes were greater in the left hand fingers compared to the right hand, and were statistically significant only in girls. (3) For the ulnar area, the RD of 13 or less is most likely to be of from male origin and that of 17 or more has a low probability of being of female origin. Comparing the radial area, an RD of 14 or less has a low probability of being of male origin while a weak probability of the RD of 17 or more is most likely being of female origin.

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Section: Resultsmentioning

confidence: 99%

Variability of Finger Ridge Density among Thai Adolescents

Nanakorn¹,

Kutanan²

2012

J Forensic Res

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“…Consequently, these two characteristics of the fingerprints have been widely studied by the researchers and analysts. [2][3][4][5][6][12][13][14][15][16][17][18] The ever increasing frequency of crime has made fingerprinting an indispensable tool in the hands of investigating officers. If the sex of the individual could be established with certainty, the burden of the investigating officer would be reduced by half.…”

Section: Introductionmentioning

confidence: 99%

“…If the sex of the individual could be established with certainty, the burden of the investigating officer would be reduced by half. 14,15 Thumb impressions are of distinct importance. They are even used in lieu of signature in India in many important documents including (but not limited to) wills, sale deed, notarized documents, bank cheques, bank documents, property documents, competitive examinations, attendance forms, etc.…”

Section: Introductionmentioning

confidence: 99%

Sex differences in the thumbprint ridge density in a central Indian population

Kapoor

Badiye

2015

Egyptian Journal of Forensic Sciences

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Background: Identification of sex plays a vital role in forensic and medico legal investigations. Fingerprints are considered to be the most precise and reliable indicators for personal and gender identification. Objectives: The objective of this study was to determine any significant difference in the thumbprint ridge density of males and females in a central Indian (Marathi) population to enable the determination of gender. Methods and materials: The study was conducted on 200 subjects (100 males and 100 females) in the age group of 18-30 years. Ridge densities on the right-and left-hand thumbprints were determined using a newly designed layout and analysed statistically. Results: The results showed that females tend to have a higher thumbprint ridge density in both the areas examined, individually and combined. Applying the t-test, the differences in the ridge densities of males and females at LoC (Left of Centre), RoC (Right of Centre) and Combined (LoC + RoC) were found to be statistically significant at p < 0.01 levels, proving the association between gender and fingerprint ridge density. Probability densities for men and women derived from the frequency distribution (at LoC, RoC and Combined) were used to calculate the likelihood ratio and posterior probabilities of gender designation for the given ridge count for subjects using Baye's theorem. Conclusion: It was concluded that differences in the thumb ridge density can be used as an important tool for the determination of gender in cases where partial thumbprints are encountered as evidence either at the crime scene or on any document(s) of forensic significance. ª 2014 Hosting by Elsevier B.V. on behalf of The International Association of Law and Forensic Sciences (IALFS).

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“…Studies have showed that females have a significantly higher ridge density than males. Okajima 57 , Moore 58 , GutierrezRedomero et al 59 , Nayak et al 60 and Krishan et al 61 proved that epidermal ridges are finer and denser in females than males.…”

Section: Fingerprints In Sex Variationsmentioning

confidence: 99%