Table 2. Multiple linear regression analysis for relationship between SOD and BP.

Variables	DBP, mmHg					SBP, mmHg
	B	Sβ	95% CI	P-value		B	Sβ	95% CI	P-value
Crude: not adjusted; model 1: adjusted for age and gender; model 2: adjusted for age, gender, current status of smoke, alcohol drinking and exercise; model 3: adjusted for age, gender, current status of smoke, alcohol drinking, exercise and disease history (diabetes, stroke and heart disease); model 4: Adjusted for age, gender, current status of smoke, alcohol drinking, exercise, disease history (diabetes, stroke and heart disease), BMI and blood biomarkers (total cholesterol, LDLC, HDLC, hs-CRP, creatine and plasma glucose). BMI: body mass index; BP: blood pressure; CRP: C-reactive protein; HDLC: high-density lipoprotein cholesterol; HR: heart rate; LDLC: low-density lipoprotein cholesterol; SOD: superoxide dismutase.
Crude	−0.109	−0.088	−0.170, −0.049	< 0.001		0.030	0.013	−0.086, 0.147	0.607
Model 1	−0.102	−0.082	−0.163, −0.041	0.001		−0.041	−0.017	−0.156, 0.075	0.493
Model 2	−0.101	−0.081	−0.162, −0.040	0.001		−0.040	−0.017	−0.155, 0.076	0.502
Model 3	−0.101	−0.081	−0.162, −0.040	0.001		−0.036	−0.015	−0.152, 0.080	0.539
Model 4	−0.089	−0.069	−0.151, −0.026	0.005		−0.034	−0.014	−0.153, 0.084	0.564