There were also reliable weak and moderate correlations between renal failure and dityrosine concentration (r = 0.27, r = 0.45, r = 0.39, r = 0.36, and r = 0.46 in samples ADP–saline, ADP1, ADP2, SP1 and SP-saline, respectively, p = 0.045). This evidence concerns the gene SP1 and Renal insufficiency.