Sex Differentiation from Fingerprint Ridge Density

Jwala Kandel, Samjhana Ghimire, Rashmita Bhandari
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Abstract

Background: Determination of sex is an important parameter other than age, race and stature during forensic identification and crime scene investigation. Females tend to have finer and denser ridges on their fingertips than males. Present study aims at differentiating gender from fingerprint ridge density. Material and Methods: This is a cross sectional study conducted from March 2022 to March 2023 in Nobel Medical College Teaching Hospital, Nepal. Seven hundred fingerprints samples (350 males and 350 females), from 70 Nepalese medical students were collected and analyzed for gender differences. Comparative analysis was done using Student’s t-test (p<0.05). Likelihood ratio and posterior probability using Baye’s theorem were calculated to interpret the possibility of gender differentiation from various fingerprint ridge densities. Results: Students t-test revealed significant difference (p < 0.001) between the fingerprint ridge density of male and female (t= -16.733). The results showed ridge density <14/25mm2and >15/25mm2 are “more likely than not” from males and females respectively. Posterior probability using Baye’s theorem further revealed ridge density <13/25mm2 (C/C1=5.75,P=0.86) and >16/25mm2 (C1/C=4.29, P1=0.84) have higher probability of originating from males and females respectively. No any male and female had ridge density >16/25mm2 and <13/25mm2 respectively. Conclusion: The study revealsstatistically significantlygreater fingerprint ridge densities in female than in male Nepalese medical students.
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指纹脊密度的性别分化
背景:在法医鉴定和犯罪现场调查中,性别是除年龄、种族和身材以外的重要参数。与男性相比,女性的指尖上往往有更细、更密的脊。本研究旨在利用指纹脊密度进行性别鉴别。材料和方法:这是一项横断面研究,于2022年3月至2023年3月在尼泊尔诺贝尔医学院教学医院进行。来自70名尼泊尔医科学生的700份指纹样本(350名男性和350名女性)被收集并分析了性别差异。比较分析使用学生t检验(p15/25mm2分别来自男性和女性“更有可能”)。贝叶斯定理的后验概率进一步揭示了脊密度16/25mm2 (C1/C=4.29, P1=0.84)分别具有较高的来自雄性和雌性的概率。雄鼠和雌鼠脊密度分别为16/25mm2和13/25mm2。结论:尼泊尔医学生女性指纹脊密度显著高于男性。
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19
审稿时长
16 weeks
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