Introduction:

Renal failure is the third most frequent organ dysfunction in patients admitted to the hospital and Intensive Care Unit; survival of critically ill patients with acute kidney injury is approximately 70%, but data in critically ill patients with chronic kidney disease are scarce.

Objective:

To contrast the medium-term survival of critically ill patients with normal renal function, acute kidney injury and chronic kidney disease.

Material and methods:

All patients consecutively admitted to the Intensive Care Unit from January 01 to December 31, 2018, were chosen, renal function was diagnosed on admission, they were followed up for 90 days and survival between the three groups was contrasted.

Results:

Of the 355 patients for the final analysis, 184 (51.8%) were diagnosed with normal renal function, 96 (27.1%) acute kidney injury, and 75 (21.1%) chronic kidney disease on admission to the Intensive Care Unit. Age was higher in the acute kidney injury and chronic kidney disease groups than in the normal renal function group (64.0 ± 17.6 and 67.8 ± 16.3 vs 56.7 ± 18.5 years, p = 0.000), the percentage of women was lower in the group acute kidney injury and chronic kidney disease than in the normal renal function group (46/96 [47.9%] y 25/75 [47.6% vs 122//184 [63.3%], p = 0.001). Survival was lower in the acute kidney injury and chronic kidney disease groups compared to the normal kidney function group (66/96 [68.75%] and 49/75 [65.33%] vs 150/184 [81.5%], Logrank test = 0.007).

Conclusions:

The medium-term survival of critically ill patients with acute kidney injury and chronic kidney disease on admission to the intensive care unit is low compared to the group with normal kidney function.