Ecological Systems and Devices Annotation << Back Effects of mutual correlation of risk factors at research of connections « population health - risk factors » Varaksin A.N., Konstantinova E.D. Effects of mutual correlation of risk factors at research of univariate connections between risk factors and prevalence of diseases have been investigated. Brief review of two methods on correction of distortions of univariate effect appearing owing to correlation of risk factors is presented. The first is a method of linear approximation and the second is a matched control (i.e. the copy – pair approach). Examples of application of the methods at the analysis of influence of ecological and social - hygienic risk factors on prevalence of preschool children’s pathologies in Ekaterinburg (Sverdlovsk region, Russia) are presented. E-mail: k_konst@ecko.uran.ru