Thirty-seven characteristics of children examined during the IVth nation-wide anthropological survey in 1981 were evaluated in relation to variables to body weight, height and Rohrer's index. For processing consecutive regression analysis was used which makes it possible to list individual factors (independent variables) according to their ability to explain the variability of dependent variables. The most important signs explaining the variability of all three dependent variables assessed by this method were signs described as genetic (height and body weight of parents) and maturity, birth length and weight which can be conceived in the wider sense of the word also as genetic characteristics which can be influenced by the environment.