Table 1.

Clinical characteristics of patients with and without AKI

All Cases (2783)AKI (803)Non-AKI (1980)P
Age, years, mean (SD)59 (17)61 (17)58 (17)0.01
Men, n (%)1691 (61)513 (64)1178 (59)0.03
SAPS II, points, median (IQR)44 (33 to 56)49 (37 to 61)42 (32 to 53)0.01
SCr0, mg/dl, median (IQR)1.1 (0.8 to 1.8)1.5 (1.0 to 2.4)1.0 (1.0 to 1.6)0.01
Main reason for mechanical ventilation, n (%)
    chronic obstructive pulmonary disease148 (5)28 (3)120 (6)0.01
    asthma21 (1)2 (0.2)19 (1)0.05
    other chronic pulmonary disease48 (2)8 (1)40 (2)0.07
    coma492 (18)98 (12)394 (20)0.01
    neuromuscular disease34 (1)4 (0.5)30 (1.5)0.03
    acute respiratory failure
        postoperative405 (15)146 (18)259 (13)0.01
        pneumonia363 (13)117 (15)246 (12)0.13
        sepsis328 (12)116 (14)212 (11)0.01
        trauma187 (7)33 (4)154 (8)0.01
        congestive heart failure160 (6)63 (8)97 (5)0.01
        cardiac arrest149 (5)51 (6)98 (5)0.13
        ARDS106 (4)32 (4)74 (4)0.74
        aspiration89 (3)22 (3)67 (3)0.40
        other ARF253 (9)83 (10)170 (9)0.14
  • Quantitative data are displayed as median, interquartile range, except for age (mean, SD). Qualitative data, as percentage across rows. Statistical significance was assessed between patients with and without AKI (t test for age, Mann–Whitney for SAPS II and SCr0. AKI, acute kidney injury; ARDS, acute respiratory distress syndrome; ARF, acute renal failure; IQR, interquartile range; SAPS, simplified acute physiology score; SCr0, serum creatinine at day 0.