Table 2.

Selected parameters of pro- and antioxidant balance in the blood of the examined groups (mean ± SD)

Age groups (years)	Number of subjects (male/female)	Malondialdehyde [µmol/g Hb]	Zn,Cu-superoxide dismutase [U/g Hb]	Catalase [BU/g Hb]	Glutathione peroxidase [U/g Hb]	Glutathione reductase [U/g Hb]
55–59 (control)	37 (17/20)	0.249±0.031	2578±170.8*	24.54±1.76*	14.95±3.17*	58.55±7.13
65–69	28 (13/15)	0.240±0.026	2490±220.0	24.17±2.11	13.36±2.29	59.89±12.76
70–74	29 (12/17)	0.229±0.0350	2440 ±206.2	24.37±2.46	14.10±2.39	56.51±12.71
75–79	29 (14/15)	0.235±0.0329	2520±203.3	23.10±1.86	13.18±2.57	57.87±10.69
80–84	32 (16/16)	0.239±0.036	2310±192.7	23.09±2.12	12.86±2.56	54.75±15.89
85–89	32 (12/20)	0.239±0.0327	2275±169.9	22.39±2.29	13.09±2.14	62.97±12.27
90+	34 (16/18)	0.261±0.0346	2155±156.8	20.47±1.27	11.01±1.71	58.42±18.41

Note: *Statistically significant differences between control group (55–59 years) and elderly persons, P<0.001.