Cardiac-surgery associated acute kidney injury requiring renal replacement therapy. A Spanish retrospective case-cohort study

Table 2 Intraoperative characteristics of patients according to need of postoperative RRT.

	No postoperative RRT (n = 690)	Postoperative RRT (n = 174)	P value
Urgent surgery (%)	4.2	22.4	< 0.001
Surgery type (%)			< 0.001
CABG only	30.3	13.8
Valve only	57.2	66.1
CABG+Valve	12.5	20.1
CPB time in minutes	104 (53)	146 (63)	< 0.001
Aortic cross clamp time in minutes	73.7 (39.0)	98.6 (44.0)	< 0.001
Use of Mannitol in CPB pump (%)	65.8	73.6	0.06
Use of Albumin in CPB pump (%)	6.4	13.2	0.003
Nadir hematocrit concentration	23.9 (4.4)	22.1 (4.3)	< 0.001
Administration of antifibrinolytic agents (%)			< 0.001
None	39.4	37.9
Aprotinin	10.4	32.8
Tranexamic or Aminocaproic acid	50.1	29.3
Packed red blood cells transfusion	1.11 (1.56)	3.05 (2.93)	< 0.001

Continuous variables are shown as mean (SD) and compared via Student's t-test. Categorical variables are shown as percentages and compared using Chi-squared test. CABG: Coronary artery bypass grafting; CPB: Cardiopulmonary bypass.

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