Duration of acute kidney injury in critically ill patients

Annals of Intensive Care

Table 4 Association of recurrent AKI with outcomes

n = 123	No recurrent AKI		p value*	Recurrent AKI	p value^§
n = 123	Short duration AKI n = 46	Medium duration AKI n = 34	p value*	Short and medium duration AKI n = 43	p value^§
Cardiovascular failure-free days to day 7 (mean ± SD)	5.1 ± 2.3	4.8 ± 2.3	0.47	4.4 ± 2.3	0.06
Ventilator-free days to day 28 (mean ± SD)	20.4 ± 10.0	20.0 ± 9.8	0.89	12.7 ± 10.6	0.003
ICU-free days to day 28 (mean ± SD)	19.7 ± 9.5	19.4 ± 8.7	0.89	11.4 ± 10.7	0.001
Death in health care facility to day 30, n (%)	5 (10.9)	4 (11.8)	1.00	12 (27.9)	0.04

Cardiovascular failure was defined as the need for vasopressor or a systolic blood pressure of 90 mmHg or less. Patients who died before day 28 were assigned zero ventilator days and zero ICU-free days
AKI acute kidney injury, ICU intensive care unit, SD standard deviation, NS nonsignificant
*Short duration AKI without recurrent AKI vs. medium duration AKI without recurrent AKI
^§Short and medium duration AKI without recurrent AKI versus short and medium duration AKI with recurrent AKI