TABLE 1.

Data on number of subjects included into the study, their gender, age and concentration of sum of PCBs in serum. MI, SV and BA stands for Michalovce, Svidnik and Bratislava regions, respectively.

Region	Number	Age (years)	Sum of PCBs serum concentrations (ng/g serum lipids)
		Mean ± SD	Min	25th percentile	Median	75th percentile	Max
MI - boys	92	12.5±0.61	36.9	221.2	410.8	806.5	4443.8
MI - girls	90	12.6±0.63	38.7	184.2	326.7	545.5	5327.7
SV - boys	83	12.7±0.74	14.5	104.4	151.6	222.9	1597.7
SV - girls	80	12.5±0.78	36.5	78.5	146.1	240.7	1407.3
BA - boys	94	12.8±0.71	44.3	105.2	147.2	232.9	922.9
BA - girls	134	12.7±0.61	34.4	80.4	117.9	213.2	1657.9