[Planning of sampling studies of morbidity and hospitalization at large territories]

This paper provides the methodological principles of planning sample survey of hospital morbidity of population at the level of large economic regions and the republic at large. Proceeding from the example of socio-hygienic study of burn injuries requiring hospital treatment, and organization of hospital care for the burned, the methods of elaborating the principles of sample surveys, the use of stratified cluster selection with optimum placing of sample units are described. The methodological scheme permits to minimize the size of the sample and to obtain representative evaluations of the needed indices at large territories. While studying 23 sample units from 796 formed in the republic, evaluations of a number of indices were obtained which virtually coincided with the indices calculated according to the total data reported.