Abstract
This study aimed to characterize the relationship between the ratio of the length of the second and fourth fingers (2D:4D value) and the speed of sound of the calcaneus by quantitative ultrasound (QUS-SOS) in undergraduate female students. We recruited 138 young women with a mean age of 19.6 ± 1.4 years. The participants’ calcaneus QUS-SOS was measured using an ultrasound bone densitometer. We also measured the participants’ weight, height, and grip strength. A self-reported questionnaire was used to obtain information on participants’ secondary sexual characteristics, and exercise habits. The present study showed that the 2D:4D value of both hands was significantly correlated with the calcaneus QUS-SOS. The 2D:4D value of the left hand was also positively associated with the calcaneus QUS-SOS results in several respects. These findings suggest that the 2D:4D value may be useful for the screening of risk for a low bone quality in undergraduate female students.
Highlights
A proper and balanced modeling and remodeling cycle of bone is the key to reducing breakability, attaining sufficient peak bone density and reducing the risk of osteoporosis in later life
The relationship between the 2D:4D value and the speed of sound of the calcaneus by quantitative ultrasound (QUS-SOS) to determine whether or not the 2D:4D value may be a useful factor for screening undergraduate female students who are at risk of having a poor bone quality
There was a significant correlation between the 2D:4D value of both hands and the calcaneus QUS-SOS
Summary
A proper and balanced modeling and remodeling cycle of bone is the key to reducing breakability, attaining sufficient peak bone density and reducing the risk of osteoporosis in later life. Sex-based differences in the ratio of the length of the second and fourth fingers (2D:4D value) have been investigated, and males have shown to have a lower 2D:4D value than females[13] This is because the 2D:4D value is influenced by the level of sex hormones such as testosterone and estrogen in fetal period[13]. Su et al reported that the development of bone is affected by the gonadal hormone levels in mothers during pregnancy[22] Both the 2D:4D value and bone density are affected during the embryonic or fetal period by the hormone levels of pregnant women, suggesting that these values may be correlated. Exercise experience in junior high school Exercise experience in high school the relationship between the 2D:4D value and the speed of sound of the calcaneus by quantitative ultrasound (QUS-SOS) to determine whether or not the 2D:4D value may be a useful factor for screening undergraduate female students who are at risk of having a poor bone quality
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