Table 2.

Intraoperative variables by acute kidney injury status

Variables	No AKI (N = 706)	AKI stage 1 (N = 81)	AKI stage 2–3 (N = 28)	P-value
Anaesthesia duration (min)	346 [260–446]	421 [339–502]	451 [354–576]	< 0.001
Surgery duration (min)	262 [184–352]	337 [263–397]	366 [282–445]	< 0.001
Total crystalloid (ml)	2000 [1300–3000]	3000 [2000–4000]	4000 [2000–5900]	< 0.001
Total colloid £ (ml)	500 [500–1000]	1000 [500–1500]	1000 [500–2000]	0.008
Total blood product (ml)	500 [300–800]	550 [396–1700]	525 [270–1900]	0.2
Total IN (ml)	2500 [1800–3500]	3500 [2500–5400]	4500 [2300–7300]	< 0.001
Estimated blood loss (ml)	500 [200–1000]	700 [300–1700]	1000 [500–1600]	< 0.001
Diuresis (ml)	300 [150–500]	300 [200–500]	300 [200–500]	0.9
Gastric suction (ml)	100 [50–100]	50 [50–100]	50 [50–160]	0.7
TOTAL OUT (ml)	900 [500–1600]	1100 [700–2100]	1400 [900–2200]	0.002
Net fluid balance (ml)	1500 [800–2300]	2300 [1400–3300]	3100 [1100–5200]	< 0.001
Use of vasopressors, $ N (%)	554 (78%)	67 (83%)	23 (82%)	0.6

Values are presented as medians [interquartiles ranges] or numbers (percentages %)

$: use of any vasopressor (ephedrine, phenylephrine, noradrenaline)

^£ total colloid included 3% gelatin and 6% tetrastarch