Table 5.

Number of non-CKD patients at each AKI stage on the basis of RIFLE and AKIN staging (n = 162)

Measured pCrmEstimated
epCr75 (75 ml/min)epCr100 (100 ml/min)epCrRand (Random)cepCrlow (Lowest)
RIFLE
    R (% error)2417 (−29.2)38 (58.3)21 ± 4 (−12.5)35 (45.5)
    I (% error)2321 (−8.7)24 (4.3)13 ± 3 (−41.6)14 (−39.1)
    F (% error)75 (−28.6)15 (114)3 ± 2 (−57.1)5 (−28.6)
    total (% error)5443 (−20.4)77 (42.6)a37 ± 4 (−31.5)a54 (−0.0)
    sensitivity (95% CI)0.76 (0.69 to 0.83)0.93 (0.89 to 0.97)0.49 ± 0.050.58 (0.51 to 0.66)
    specificity (95% CI)0.98 (0.96 to 1.0)0.75 (0.68 to 0.82)0.90 ± 0.030.80 (0.73 to 0.86)
AKIN
    I (% error)4237 (−11.9)52 (23.8)31 ± 4 (−26.2)66 (57.1)
    II (% error)2321 (−8.7)24 (4.3)13 ± 3 (−41.6)14 (−39.1)
    III (% error)75 (−28.6)15 (114)3 ± 2 (−57.1)5 (−28.6)
    total (% error)7263 (−12.5)91 (26.4)a48 ± 4 (−33.3)b85 (18.1)
    sensitivity (95% CI)0.76 (0.70 to 0.83)0.93 (0.89 to 0.97)0.55 ± 0.040.86 (0.81 to 0.91)
    specificity (95% CI)0.91 (0.87 to 0.95)0.73 (0.67 to 0.80)0.90 ± 0.030.74 (0.68 to 0.81)
  • a P < 0.05;

  • b P < 0.01.

  • c Each statistic for epCrRand is the mean ± SD of 1000 generations of 224 random creatinines across the lognormal curve.