Table 4.

Factors associated with postoperative acute kidney injury defined by the Acute Kidney Injury Network Criteria (n = 1052)

CovariateOR (95% CI)P
Age (years)1.03 (1.01 to 1.05)0.001
DM1.66 (1.14 to 2.44)<0.001
Recent MI1.78 (1.16 to 2.72)0.009
IABP3.56 (1.83 to 6.96)<0.001
Nonelective surgery3.66 (2.15 to 6.25)<0.001
Proteinuria
    no proteinuria1
    mild proteinuria1.66 (1.09 to 2.52)0.018
    heavy proteinuria2.30 (1.35 to 3.90)0.002
CKD stage
    preserved eGFR1
    stage 31.68 (1.12 to 2.52)0.012
    stage 43.01 (1.57 to 6.03)0.001
  • Preserved eGFR, eGFR ≥60 ml/min per 1.73 m2. Mild proteinuria was defined as +/− to 1+ on urine dipstick examination; heavy proteinuria was defined as 2+ to 4+ on urine dipstick examination. Multiple logistic regression model: n = 1052, adjusted generalized R2 = 0.30, estimated area under the ROC curve = 0.82, and Hosmer-Lemeshow goodness-of-fit test P = 0.94 > 0.05 (degree of freedom = 8).