Table 3. Correlations Between the Ratio of SNP-Stimulated Maximal FBF to Basal FBF and Variables.

Variables	Coefficient	p Value
Age (yrs)	-0.127	0.372
Body mass index (kg/m2)	-0.049	0.730
Systolic blood pressure (mm Hg)	0.107	0.453
Diastolic blood pressure (mm Hg)	0.040	0.780
Heart rate (beats/min)	-0.086	0.546
Total cholesterol (mmol/l)	-0.120	0.407
HDL cholesterol (mmol/l)	0.005	0.972
Triglyceride (mmol/l)	0.147	0.308
Mean fasting glucose (mmol/l)	0.049	0.768
Serum insulin (pmol/l)	-0.045	0.776
Insulin resistance (HOMA index)	-0.044	0.801
Number of pack-yrs smoked	0.021	0.886

SNP = sodium nitroprusside; other abbreviations as in Table 1.