Table 4.

Spearman coefficients of linear association between duration of CPB and markers of hemolysis and inflammation, stratified by group.

	Groups
Variables	G1 (roller pump)	G2 (centrifugal pump)
LDH, 24h PO	0.346	0.407*
IL-6, post-CPB	0.516**	0.304
TNF-α, post-CPB	0.382*	-0.006

^*P<0.05;

^**P<0.01

CPB=cardiopulmonary bypass; IL-6=interleukin-6; LDH=lactate dehydrogenase; PO=postoperatively; TNF-α=tumor necrosis factor alpha