Table 2.

Distribution of AKI severity using different methods of estimating baseline SCr, in patients with no known baseline renal function

Baseline SCr Estimation MethodEstimated Baseline eCCl (mean ± SD; ml/min per 1.73 m2)Total AKI % (95% CI)pRIFLE R % (95% CI)pRIFLE I % (95% CI)pRIFLE F % (95% CI)
Critically ill group (n = 41)
    eCCl100All 10063.4 (46.9 to 77.9)17.1 (7.2 to 32.1)24.4 (12.4 to 40.3)22.0 (10.6 to 37.6)
    eCCl120All 12082.9 (67.9 to 92.8)14.6 (5.6 to 29.2)36.6 (22.1 to 53.1)31.7 (18.1 to 48.1)
    AdmSCr62.6 ± 24.412.2 (4.1 to 26.2)7.3 (1.5 to 19.9)2.4 (0.0 to 12.9)2.4 (0.0 to 12.9)
    NormsMin140.0 ± 33.887.8 (73.8 to 95.9)12.2 (4.1 to 26.2)39.0 (24.2 to 55.5)36.6 (22.1 to 53.1)
    NormsMax98.1 ± 19.153.7 (37.4 to 69.3)14.6 (5.6 to 29.2)17.1 (7.2 to 32.1)22.0 (10.6 to 37.6)
Noncritically ill (n = 65)
    eCCl100All 1004.6 (1.0 to 12.9)1.5 (0.0 to 8.3)3.1 (0.4 to 10.7)0.0 (0.0 to 5.5)
    eCCl120All 12012.3 (5.5 to 22.8)7.7 (2.5 to 17.0)3.1 (0.4 to 10.7)1.5 (0.0 to 8.3)
    NormsMin185.2 ± 106.143.1 (30.8 to 56.0)7.7 (2.5 to 17.0)26.2 (16.0 to 38.5)9.2 (3.5 to 19.0)
    NormsMax125.5 ± 25.520.0 (11.1 to 31.8)10.8 (4.4 to 20.9)9.2 (3.5 to 19.0)0.0 (0.0 to 5.5)
  • eCCl100, estimated creatinine clearance of 100 ml/min per 1.73 m2; eCCl120, estimated creatinine clearance = 120 ml/min per 1.73 m2; AdmSCr, admission serum creatinine; NormsMin, minimum normative values for age and gender; NormsMax, maximum normative values for age and gender.