Table 2. Risk of peripheral arterial disease by age of daily smoking onset.

		Adjusted*		Adjusted+Lifetime Smoking Burden
		OR (95% CI)	P-value	OR (95% CI)	P-value	P-value for difference
Never daily smoking		Ref		Ref
Self Reported Adult smokers		1.67 (1.18–2.37)	0.004	1.06 (0.71–1.58)	0.782	0.041
Self Reported Childhood smokers		2.86 (1.99–4.11)	<0.001	1.55 (1.00–2.41)	0.049

*Adjusted for age, gender, race, systolic blood pressure, use of anti-hypertensive medication, obesity class, total cholesterol, high-density lipoprotein cholesterol, use of lipid-lowering medication, diabetes, creatinine, coronary artery disease.

OR, odds ratio; CI, confidence interval; Ref, reference.