Table 6-1.

Multiple regression analysis for urinary 8-isoprostane

Subjects	Explanatory variable	β	p value	Adjusted R2
Malea)				0.120
	Age	−0.252	<0.001
	Smoking	0.363	<0.001
Femaleb)				0.024
	Smoking	0.146	0.004
	Age	−0.108	0.035