Table 4.

Oxidative stress biomarkers according to gender and age groups

Age groups	(n)			8-isoprostane (ng/mg creatinine)			8-OHdG (ng/mg creatinine)
(years)	All	Male	Female	Male	Female	p	Male	Female	p
20–29	(102)	(43)	(59)	0.78 ± 0.04	0.52 ± 0.05	0.011*	7.59 ± 0.02	7.97 ± 0.02	0.546
30–39	(207)	(87)	(120)	0.72 ± 0.03	0.57 ± 0.03	0.035*	7.85 ± 0.02	8.04 ± 0.02	0.667
40–49	(201)	(97)	(104)	0.66 ± 0.04	0.53 ± 0.03	0.056	8.19 ± 0.01	7.71 ± 0.02	0.316
50–59	(141)	(56)	(85)	0.61 ± 0.04	0.46 ± 0.04	0.055	9.35 ± 0.02	10.84 ± 0.02	0.027*
60–69	(26)	(10)	(16)	0.68 ± 0.05	0.39 ± 0.12	0.139	7.50 ± 0.05	12.20 ± 0.02	<0.001**

*p<0.05, **p<0.01

Each value represents the mean ± SE.

p values were analyzed by Unpaired t test between male and female.

Log-transformed data in urinary 8-isoprostane and 8-OHdG