Table 2.

Outcomes of patients with and without AKI

All cases (2783)AKI (803)Non-AKI (1980)P
Invasive mechanical ventilation,a n (%)2669 (96)781 (97)1888 (95)0.02
Days between hospital and ICU admission, mean (SD)4.7 (15.0)5.6 (17.5)4.3 (13.9)0.04
Days between ICU admission and mechanical ventilation, mean (SD)0.5 (1.9)0.6 (2.1)0.4 (1.9)0.10
Days on mechanical ventilation, median (IQR)6 (4 to 10)6 (4 to 10)5 (4 to 9)0.74
ICU length of stay, days, median (IQR)10 (6 to 18)12 (6 to 20)11 (7 to 19)0.31
Hospital length of stay, days, (IQR)20 (11 to 35)19 (10 to 33)20 (11 to 35)0.03
ICU mortality, n (%)1023 (37)397 (50)626 (32)0.01
In-hospital mortality, n (%)1207 (43)445 (55)762 (38)0.01
  • Summary data on outcomes, according to the objectives of the study. Time-dependent variables (days on mechanical ventilation, ICU, and hospital length of stay) were considered only in survivors. AKI, acute kidney injury; ICU, intensive care unit; IQR, interquartile range.

  • a There were a few patients receiving only noninvasive mechanical ventilation at study entry, explaining why the percentage of patients in this row is not 100%.