Table 3.

Serum level of malondialdehyde, activity of glutathione S-transferase and level of total glutathione in breast cancer patients and control group in regards to age.

Under 50 Years of Age
Parameters	n	Before Surgery	Two Hours after Surgery	Five Days after Surgery	n	Control
MDA, nmol/mL	34	10.04 ± 5.2	11.68 ± 8.39 *	8.94 ± 4.24 *	20	6.06 ± 1.72
GST, µmol/mL/min	34	0.33 ± 0.16	0.34 ± 0.17	0.33 ± 0.16	20	0.41 ± 0.19
GSH + GSSG, µmol/mL	34	0.51 ± 0.21	0.46 ± 0.14	0.49 ± 0.24 ●	20	0.98 ± 0.13 ●
Over 50 Years of Age
Parameters	n	Before Surgery	Two Hours after Surgery	Five Days after Surgery	n	Control
MDA, nmol/mL	18	13.67 ± 6.76 *	18.18 ± 10.76 *	11.46 ± 6.30 ●	22	7.40 ± 1.83 ●
GST, µmol/mL/min	18	0.43 ± 0.13	0.44 ± 0.14	0.39 ± 0.17 ●	22	0.55 ± 0.16 ●
GSH + GSSG, µmol/mL	18	0.41 ± 0.13	0.41 ± 0.11	0.47 ± 0.15 ●	22	0.60 ± 0.17 ●

GSH + GSSG = total glutathione; GST = glutathione S-transferase; MDA = malondialdehyde; n = number of patients.* p <0.017; ^● p <0.05.