Figure 7. We measured intact PTH using the intact PTH assay as described in the method section in 18 patients on dialysis (blue bars), for further detail see also table 2 .

When removing the oxidized forms of PTH from the sample as illustrated in figure 6, the results were completely different (red bars). The effect of oxidation of PTH is highly variable among these patients requiring dialysis. There is only a very weak correlation between traditionally measured PTH and PTH data considering the oxidation of this hormone.