Great, computerized sets of results of the 18 most popular biochemical examinations performed with standard, computerized methods in automated analyzers, connected for 2 (-5) years in 6 polish medical laboratories were statistical analyzed with the original JEG method. The reproducibility with the time were good. Averaged results from all laboratories were compared with reference values averaged from 4-16 bibliographic sources. Only in 4 serum constituents, all of them connected with protein metabolism, the comparative analysis (test t) shoved statistical significant differences between the laboratory results and reference values. Lover range of the Gaussian part of the distribution of laboratory results were significant diminished for the total protein (56.3 g/L ver. 64.2 g/L), and three metabolites: creatinine (41.95 umol/L ver. 64.1 umol/L), uric acid (98.4 mmol/L ver. 171.9 mmol/L), and urea (1.37 mmol/L ver. 2.6 mmol/L). In urea and total protein levels also the mean values of the Gaussian part were statistical significant diminished. These situation were confirmed with the analysis of 1068 results of albumin examination in the population of Warsaw region, which show the quantitative shifts analogue to the protein results. Confirmed were the practical usefulness of the very cheap and easy JEG method especially for the analysis of results of investigation of great populations.