Incidence and outcomes of acute kidney injury after cardiac surgery using either criteria of the RIFLE classification

Table 1 Baseline, clinical and operative characteristics (N = 443)

Variable
Age (years)	69.0 (60.0 - 76.0)
Gender (Female) (%)	133 (30.0)
BMI (kg/m²)	26.2 (23.7 - 29.4)
Hypertension (%)	351 (81.0)
COPD (%)	84 (19.0)
Angina pectoris (%)	197 (44.5)
Myocardial infarction previous surgery (%)	116 (26.2)
Diabete mellitus (%)	100 (22.6)
Emergency (%)	12 (2.70)
Preoperative GFR (mL/min)	78.0 (64.0 - 92.0)
Preoperative hemoglobin (g/dL)	13.9 (12.6 - 14.8)
LVEF < 60 % (%)	114 (25.7)
Logistic Parsonnet (%)	6.30 (3.10 - 13.6)
Logistic EuroSCORE1 (%)	4.00 (2.10 - 7.50)
Surgical delay (days)	21.0 (7.00 - 42.0)
Type of surgery:
OPCABG (%)	58 (13.1)
CABG (%)	182 (41.1)
Valve surgery (%)	148 (33.4)
Valve and CABG (%)	55 (12.4)
CPB time (min.)^*	87.0 (73.0 - 104.0)
Aortic cross clamp time (min.)^*	55.0 (41.0 - 69.0)
Nadir hematocrit (%)	21.0 (19.0 - 24.0)
Nadir MAP during surgery (mmHg)	45.0 (40.0 - 55.0)
Days in ICU	2.0 (2 - 4)
Days in hospital	12.0 (10 - 18)

Data are expressed as median (25-75th percentiles) or proportion of patients in %
^*Data are calculated as median (25-75th percentiles) only for cases with cardiopulmonary bypass (n = 385)
BMI: body mass index; COPD: chronic obstructive pulmonary disease; GFR: glomerular filtration rate; LVEF: left ventricular ejection fraction; surgical delay: delay between diagnostic coronarography and surgery; OPCABG: off-pump coronary bypass graft; CABG: coronary artery bypass graft with cardiopulmonary bypass; Valve surgery: aortic valve replacement or mitral valve repair/replacement surgery; Valve and CABG: aortic valve replacement or mitral valve repair/replacement surgery combined with coronary artery bypass graft; CPB: cardiopulmonary bypass; MAP: mean arterial pressure.^*: n = 385; ICU: intensive care unit

ISSN: 1471-2369