Table 5.

Correlation of SOD2 mRNA with exercise habits

	No smoking			Past smoking			Present smoking
	r	p		r	p		r	p
Total	0.171	0.015		0.078	0.527		0.094	0.399
Male	0.136	0.282		0.069	0.613		0.011	0.929
Female	0.092	0.282		0.003	1.000		0.300	0.545