Table III. The alteration of the plasma catalase (CAT), malonidialdehyde (MDA) and 4-hydroxynonenal (4-HNE) concentrations following surgery in all groups combined (all patients). Plasma concentrations were measured before (PRE), immediately after (POP1) and 24 h postoperatively (POP2). Median (interquartile range) concentrations are shown.

*Wilcoxon signed-rank test.