Digit and digit ratio of Xinjiang young Kazakh nationality / 中国组织工程研究

ABSTRACT

BACKGROUND:Digit ratio is basical y determined within the first 3 months of fetal development. Digit and digit ratio exhibit differences between genders and between left and right hands. Nationality, regional and ethnic difference may also influence the digit ratio. So far, there is no report about the digit ratio of Kazakh adults. OBJECTIVE:To study the characteristics of digit ratio of young Kazakh nationality in Xinjiang of China. METHODS:A total of 200 young Kazakh volunteers in Xinjiang, aged 18-25 years, were enrol ed, including 100 males and 100 females. These participants were subjected to posteroanterior X-ray of both hands. Phalanx length and body height were measured, and the resulting data were statistical y analyzed using SPSS19.0 software. RESULTS AND CONCLUSION:The digit ratio of Xinjiang Kazakh people was 3D>4D>2D>5D. Male digit ratio possessed the tendency of 3D5D>4D5D>2D5D>3D4D>3D4D>2D3D>2D4D;female digit ratio possessed the tendency of 3D5D>2D5D>3D4D>4D5D>2D4D>2D3D. The digit ratio of 2D3D, 3D4D, 4D5D was higher in the male than the female;the digit ratio of 2D4D, 2D5D, 3D5D was higher in the female than the male. Digit ratio had sexual differences, especial y in 3D5D (P<0.05), and had bilateral differences, especial y in 2D4D and 4D5D (P<0.05). These findings indicate that the digit ratio of Xinjiang Kazakh people exhibits a bilateral difference, especial y in 2D4D and 4D5D, as wel as a sexual difference, especial y in 3D5D .