Table 1.

Preoperative and CPB comparison ± SD.

Description	RAP (n = 519) ± SD	No RAP (n = 783) ± SD	p Values
Patient age (years)	65.93 ± 9.97	65.74 ± 10.10	.735
BSA	2.07 ± .28	2.08 ± .26	.472
Hemoglobin (g/dL)	12.96 ± 1.87	12.71 ± 1.85	.015
Hematocrit (%)	38.67 ± 5.26	37.64 ± 5.49	.001
Creatinine (mg/dL)	1.20 ± .95	1.15 ± .82	.364
Preoperative history of CKD (number of patients and percentage)	27 (5.20%)	37 (4.72%)	.935
Preoperative history of ESRD (number of patients and percentage)	7 (1.34%)	8 (1.02%)	.586

BSA, body surface area; CKD, chronic kidney disease; CPB, cardiopulmonary bypass; ESRD, end stage renal disease; RAP, retrograde autologous priming.