Table 1.

Baseline Demographics of Patients Receiving Renal Replacement Therapy

Variable	n (%) or Median (IQR)
Age, y	5.2 (0.4, 16.1)
Male sex	40 (66.7)
Weight*, kg	15.85 (4.45, 51.35)
Weight-for-age z-score*	−0.95 (−1.86, −0.02)
Height*, cm	107.0 (54.0, 156.0)
Height-for-age z-score*	−1.23 (−2.27, −0.29)
BMI z-score*	−0.19 (−1.41, 0.73)
Surgical patients	47 (78.3)
Cardiopulmonary bypass time, min	238 (179, 318)
Cross clamp time, min	118 (63, 202)
Circulatory arrest time, min	0 (0, 2)
PRISM-3 score*	13 (7, 20)
Percent fluid accumulation†, %	10.3 (4.8, 17.1)
Lowest eGFR†, mL/min/1.73 m2	15.75 (11.58, 20.69)
Admission BUN, mg/dL	17 (11, 26)
Pre-RRT BUN, mg/dL	130 (86, 155)
Urine output‡, mL/kg/hr	0.4 (0.1, 1.3)
Time from CICU admission to RRT, d	14.4 (7.4, 36.2)
Indication for RRT
Fluid removal	19 (31.7)
Clearance	26 (43.3)
Fluid removal and clearance	15 (25.0)
Mode of RRT
CRRT	20 (33.3)
IHD	22 (36.7)
PD	18 (30.0)
Vasoactive inotropic score§	10 (3.2, 17.5)
Mechanical ventilation§	59 (98.3)
CMV	52 (88.1)
HFOV	7 (11.9)
Ventilator-free days‖	0 (0, 3)
ECMO during hospitalization	42 (70)

Values are presented as either count (with percentage of whole in parentheses) or median value (with interquartile range in parentheses).

BMI = body mass index; BUN = blood urea nitrogen; CICU = cardiac intensive care unit; CRRT = continuous renal replacement therapy; CMV = conventional mechanical ventilation; ECMO = extracorporeal membrane oxygenation; PRISM = Pediatric Risk of Mortality; eGFR = estimated glomerular filtration rate; HFOV = high frequency oscillatory ventilation; IHD = intermittent hemodialysis; IQR = interquartile range; PD = peritoneal dialysis; RRT = renal replacement therapy

^*Measured at CICU admission

^†Measured between CICU admission and RRT initiation

^‡Measured in the 24 hours prior to RRT initiation

^§At time of RRT initiation

^‖In 28 days following RRT initiation