Table 1 Characteristics of enrolled patients

Age (years), mean (standard deviation)

68.3 (15.5)

Female, n (%)

77 (55.8)

Acute Physiology and Chronic Health Evaluation II score, mean (standard deviation)

27.6 (8.2)

Body mass index (kg/m²)^a

30.7 (8.4)

Surgical admission, n (%)

36 (26.1)

Primary admission diagnosis, n (%)

   Cardiovascular

15 (10.9)

   Pulmonary

33 (23.9)

   Gastrointestinal

26 (18.8)

   Neurologic

6 (4.3)

   Sepsis

31 (22.5)

   Metabolic

6 (4.3)

   Hematologic

16 (11.6)

   Renal

2 (1.4)

   Orthopedic

3 (2.2)

Renal classification, n (%)

   Acute renal failure

85 (61.6)

   Acute on chronic

32 (23.2)

   Chronic renal failure

9 (6.5)

   Chronic dialysis

12 (8.7)

Creatinine clearance (ml/min/1.73 m²), mean (standard deviation)

18.9 (6.5)

Creatinine clearance, n (%)

   <10 ml/min/1.73 m² or chronic dialysis

13 (9.4)

   10 to 14.9 ml/min/1.73 m²

28 (20.3)

   15 to 19.9 ml/min/1.73 m²

37 (26.8)

   20 to 24.9 ml/min/1.73 m²

31 (22.5)

   25 to 30 ml/min/1.73 m²

29 (21.0)

Intensive care unit length of stay (days), median (interquartile range)

9 (5 to 15)

Management during intensive care unit stay^b

   Never dialyzed

76 (55.1)

   Intermittent hemodialysis only

30 (21.7)

   Continuous hemodialysis (includes slow low-efficiency dialysis) only

10 (7.2)

   Peritoneal dialysis only

3 (2.2)

   Intermittent and continuous hemodialysis

17 (12.3)

   Intermittent hemodialysis and peritoneal dialysis

1 (0.7)

   Continuous hemodialysis and peritoneal dialysis

0 (0)

   Intermittent and continuous hemodialysis, and peritoneal dialysis

1 (0.7)

Intensive care unit mortality, n (%)

29 (21.0)