Prevalence of digital ridge and palmar crease pattern types and associated factors among high school students in Dessie town, Northeast Ethiopia.

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Addis Abeba University


Introduction: The term dermatoglyphics is composed of two Greek words, “derma” and “glyphic” meaning skin and curves respectively. It indicates the study of the epidermal ridge configuration on the fingers, palms and soles. Palmar creases or lines are epidermal flexure lines present on palmar surface of the hands .These are unique, permanent and genetically controlled morphological variables. Dermatoglyphics and palmar creases are important tools for diagnosis of congenital diseases, personal identification, and criminal investigations. Objective: This study aims to assess prevalence and associated factors of digital ridge and palmar crease pattern types, among high school students in Dessie town, Northeast Ethiopia. Methods and materials: A cross- sectional survey qualitative and quantitative study was conducted. Systematic random sampling technique was used to select study subjects. The data was collected using self-administer structured questionnaires and by observational checklist after taking photograph of fingers and palms of students. A Pearson chi-square test, Independent t-test, bivariable and multivariable multinomial logistic regression models were employed using SPSS (version 20). Significance was set at p value less than 0.05. Results: : Most of the study participants had loop type digital ridge pattern which accounts 60.2%, whereas whorl and arch types accounted 32.2% and 7.6% respectively. Females were less likely to have arch pattern (AOR=0.57; 95%CI: 0. 40, 0.82) and loop pattern (AOR=0.69; 95%CI: 0.61, 0.8) than whorl pattern, when the rest variables are kept constant. Being right hand had higher loop pattern (AOR=1.19; 95%CI: 1.04, 1.36) than whorl pattern. The mean difference of ridge count was significantly higher among male students (0.005) and whorl pattern types (0.001). Among variant palmar crease types Simian crease pattern (5.9%) was the most common followed by Suwon crease pattern (3.5%), and Sydney crease pattern was the least (2.7%). Normal palmar crease was significantly higher among females but variant palmar creases are significantly higher among males (0.03). Conclusion: The loop type was the most prevalent type of digital ridge pattern. The mean of ridge count of male was higher than female students. Among the palmar crease pattern, Normal crease pattern was the most prevalent type and the common type among the variant palmar crease patterns was Simian crease.



Dermatoglyphics, Arch, Loop, Whorl, Simian crease, Sydney crease, Suwon crease.