Abstract
Study Objective: To work out the sexual development standards for ethnic Khanty 7 to 17 years old and their comparative analysis with similar parameters of alien population in the Middle Ob Region of the same age. Study Design: cross-sectional cohort comparative study. Materials and Methods. The study included 2,554 children born in Yugra – Khanty-Mansiysk autonomous district and alien adolescents, and 2,431 ethnic Khanty children aged 7 to 17 years with health group I–II. Sexual development formulas were developed on the basis of publications by J.M. Tanner (1969–1970) and M. V. Maksimova (1977). Sexual development formulas were evaluated; the results were analysed in two groups of children and adolescents — ethnic Khanty and alien population in the Middle Ob Region. We compared the mean age (M ± SD) when each of the secondary sex characters appeared and formed. Study Results. We found out that the Khanty develop secondary sex characters later than the alien population, both in girls and boys. Secondary sex characters are formed at the same age in both groups due to faster rate in the Khanty, save for axillary pilosis: in Khanty adolescents, this character is formed later. A distinctive feature of sexual development of Khanty boys is absence of stage P5 of pubic pilosis according to J. M. Tanner and of facial hair. Conclusion. The patterns we found necessitate the use of a differentiated approach to evaluation of sexual development of the Khanty and alien population of Yugra – Khanty-Mansiysk autonomous district. Use of the standards developed for other population groups may cause overdiagnosis of sexual development retardation in children and adolescents in this ethnic group. Keywords: sexual development, children, ethic characteristics, the Khanty.
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