Table 2.

Mortality likelihood ratios for AKI severity stages

DefinitionAll HospitalizationsICUNon-ICU
Stage 1Stage 2Stage 3Stage 1Stage 2Stage 3Stage 1Stage 2Stage 3
pRIFLE1.44 (0.99 to 2.09)2.28 (1.53 to 3.41)6.64 (4.82 to 9.15)3.08 (1.64 to 5.79)6.06 (3.26 to 11.3)20.49 (12.0 to 35.0)0.91 (0.55 to 1.50)0.96 (0.51 to 1.81)1.96 (1.17 to 3.31)
AKIN1.69 (1.19 to 2.41)2.29 (1.57 to 3.35)6.383.835.8213.371.00.771.02
KDIGO1.30 (0.87 to 1.93)1.90 (1.25 to 2.89)a5.15 (3.84 to 6.90)a2.85 (1.59 to 5.13)a4.42 (2.47 to 7.89)a14.34 (9.18 to 22.4)a0.73 (0.41 to 1.30)0.82 (0.41 to 1.64)1.22 (0.69 to 2.13)
  • The likelihood of death (and 95% confidence interval) for each AKI severity stage is compared with that of hospitalizations not complicated by AKI. ICU, intensive care unit.

  • a P<0.05 after correction for multiple testing.