Table 2.

Association of AKI duration with outcomes

	Short duration AKI n = 76	Medium duration AKI n = 47	Persistent AKI n = 77	p value (short vs. medium duration AKI)	p value (short duration vs. persistent AKI)	p value (medium duration vs. persistent AKI)
Cardiovascular failure-free days to day 7 (mean ± SD)	4.8 ± 2.3	4.8 ± 2.2	3.2 ± 2.4	0.98	< 0.001	0.001
Ventilator-free days to day 28 (mean ± SD)	17.6 ± 10.8	17.5 ± 10.7	13.2 ± 10.0	0.97	0.009	0.02
ICU-free days to day 28 (mean ± SD)	16.6 ± 10.7	16.9 ± 9.9	10.8 ± 9.3	0.85	0.001	0.001
Death in health care facility to day 30, n (%)	14 (18.4)	7 (14.9)	16 (20.8)	0.80	0.87	0.56

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