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KMID : 1234920100100010041
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Journal of Korean Oriental Association for Study of Obesity
2010 Volume.10 No. 1 p.41 ~ p.48
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Second to Fourth Digit Ratio and Sexually Dimorphic Body Composition
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Park Jung-Hyun
Song Mi-Young
Kim Ho-Jun
Lee Myeong-Jong
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Abstract
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Background: The length of the second digit (the index finger) relative to the length of the fourth digit (the ring finger) is sexually dimorphic as males have a lower second to fourth digit ratio (2D:4D). There is evidence that sex differences in 2D:4D arise from in utero concentrations of sex steroids, with a low 2D:4D (male typical ratio) being positively related to prenatal testosterone, while a high 2D:4D (female typical ratio) is positively associated with prenatal oestrogen Objective To investigate possible associations between 2D:4D ratio and sexually dimorphic body composition
Methods: 2D:4D ratio, body mass index (BMI), waist circumference, waist-hip ratio (WHR), weight, and body fat percentage was measured from 46 men and 20 women
Results: Digit ratio was found to be significantly lower in men than in women. No significant correlation between 2D:4D ratio and body compositions was found for both men and women while digit ratio in obese men was significantly higher than normal weight men.
Conclusion: This finding dose not support the significant correlation between digit ratio and sexually dimorphic body composition. However digit ratio in obese men was significantly higher than normal weight men.
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KEYWORD
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digit ratio, sex differences, body compositions
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