[Helminthiases among the population of northwestern Siberia. 1. Opisthorchiasis and mixed invasion in the native inhabitants of the Ob River basin and their clinical course]. / Gel'mintozy u naseleniia severa Zapadnoi Sibiri. Soobshchenie 1. Opistorkhoz i mikstinvazii u korennykh zhitelei Priob'ia i ikh klinicheskoe techenie.

The use of multifactor statistic analysis for screening population of the northern part of the Ob river basin for helminthiasis allowed the authors to reveal a significant feedback between manifested opisthorchiasis and other types of this disease course in both sexes. The main component analysis indicates that the tentatively control group of males is presented by adolescents (14-17 years old) who are likely to be infected with Opisthorchis without evidence of its clinical manifestations. The correlation analysis demonstrated also a direct relationship between the age and manifest opisthorchiasis, as well as double mixed invasion of males (r-0.15 and 0.26, p less than 0.05 and 0.01, respectively). The first three main components explain about 55% variance in the correlation matrix of initial parameters and allow to reveal the variance source, taking into account, along with differentiation of 4 groups of opisthorchiasis patients, also the age- and sex-dependent combination of opisthorchiasis with other helminthic invasions.