Adjusted SPPB score (A) and adjusted odds ratio of low SPPB score (≤ 6) (B) according to ABI categories. The results were adjusted for age, race, sex, education, smoking, alcohol, body mass index, antihypertensive drugs, systolic blood pressure, lipid lowering drugs, total and HDL cholesterols, diabetes, and history of coronary disease, heart failure, and stroke. * Indicates statistical significance with ABI 1.11-1.20 as the reference.