Table 3. Perioperative anemia of patients with and without acute kidney injury (AKI).

	All (N = 79)	AKI (N = 23)	No AKI (N = 56)	P
	Mean (± SD) or median (IQR) or N (%)	Mean (± SD) or median (IQR) or N (%)	Mean (± SD) or median (IQR) or N (%)
Blood loss during operation, ml	1000(700,2000)	1200(800,2500)	1000(600,1950)	0.042
Transfusion	41(56.9%)	15(69.6%)	26(46.4%)	0.162
Baseline Hb, g/l	130.7(±20.2)	124.9(±20.5)	132.8(±19.9)	0.14
Postoperative Hb, g/l	112.4(±19.5)	104.2(±16.3)	115.4(±19.9)	0.02
Preoperative anemia	11(13.9%)	4(21.1%)	7(13.0%)	0.4
Postoperative anemia	46(58.2%)	17(74.0%)	29(51.8%)	0.049

Hb: hemoglobin.

SD: standard deviation, IQR: interquartile range.