Age and ethno-territorial differences of some linear parameters of the proximal phalanges of the hand of female peoples of tajikistan and western india

The age morphology of the skeletal system makes it possible to assess the most reliable indicators of chronological changes in the body. The modern objectives of age morphology are a more complete characterization of each age period of a person. The aim of the study is differences in the age and ethno-territorial aspect of the linear parameters of the length of the proximal phalanges and the width of their diaphysis in female peoples in Tajikistan and of Mumbai City (Western India) to develop regression equations and assessing the possibility of using them to predict the age of children and adolescents by the size of the proximal phalanges. We examined 323 radiographs of the right hand of female persons of Tajik nationality and of Mumbai City (Western India) 6-17 years old. The dependence of age on the length of the proximal phalanges and the width of their diaphysis was studied using paired linear regression analysis and correlation analysis. The length of the proximal phalanges of the hand of representatives of Tajikistan and Western India correlates with age with correlation coefficients greater than 0,75. For width, satisfactory correlation coefficients with age from 0,55 to 0,71 were obtained only for Tajik girls. For Indian girls, these ratios range from 0,39 to 0,55. One-dimensional linear regression models were constructed for predicting age along the length of the proximal phalanges with a coefficient of determination R2 greater than 0,6. In girls from Tajikistan, the lengths of II-IV proximal phalanges turned out to be good predictors, in representatives of Western India, the lengths of II-V phalanges. 18 significant differences in the length and width of the proximal phalanges were found between ethnic groups of the same age. Thus, the length of the proximal phalanges is a better predictor of age than the width. For both ethno-territorial groups, the most reliable predictor is the length of the third proximal phalanx. The linear parameters of the proximal phalanges increase unevenly with age, their intensive growth is observed mainly in the interval of 7-8 and 10-11 years. At the same time, at 6 years old, the width of the proximal phalanges of Tajik girls is less than that of Western Indian girls, and at 13-14 years old, the parameters of the proximal phalanges of Tajik girls exceeded those of Indian girls.