Table 2.

Distribution of urinary biomarker concentrations by maximum Acute Kidney Injury Network stage

VariableAKIN Stage 1AKIN Stage 2AKIN Stage 3P Valuea
Patients (n)1562622
uAnCR (ng/mg)29.22 (10.72–82.42)36.39 (14.56–163.54)96.7b (38.23–457.34)0.002
uRenCR (pg/mg)257.28 (113.88–564.34)406.79 (144.06–922.47)894.71b (335.43–2894.06)0.001
  • Biomarker concentrations are reported as median (interquartile range). AKIN, Acute Kidney Injury Network; uAnCR, urinary angiotensinogen-to-creatinine ratio; uRenCR, urinary renin-to-creatinine ratio.

  • a Kruskal-Wallis test.

  • b P<0.05 in post hoc pairwise comparison with AKIN stage 1 group.