ABSTRACT
The presented method of descriptive epidemiological study with the aid of a computer was designed using the model of an average district with a data file of carcinoma incidence from the period 1975-1983. The method is based on processing the statistical characteristics of a data file and on their evaluation. Plotting the coordinates of the communities and of the boundaries of the district constitutes the frame for the construction of maps. The population is divided into age groups of 5 years, incidence is standardized with respect to the age standard of the district. The selection of boundaries (isolines) of zones in the maps is based on the evaluation of the distribution of incidences and on the relative number of inhabitants in communities classified according to the standardized values. The application of the study to the work of centers for clinical oncology is discussed.
Subject(s)
Carcinoma/epidemiology , Czechoslovakia , Female , Humans , Male , Minicomputers , Sex Factors , Time FactorsABSTRACT
The authors describe the synchronization of farrowing by the induction of parturition with a prostaglandin F2alpha analogue (Cloprostenol). The time sequence of the beginning of parturitions was recorded in 147 sows after administration of 175 microgram Cloprostenol. 93.7% of the parturitions take place between the 14th and 39th hour after administration, the peak time being between the 24th and 27th hour (31.2%). The schedule of the farrowing days is described as a prerequisite for a qualitative change in the organization of work in large pig herds.
