D-Dimer, Inflammatory Markers, and Lower Extremity Functioning in Patients With and Without Peripheral Arterial Disease

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Abstract
Background— We determined whether higher levels of D-dimer, C-reactive protein (CRP), fibrinogen, and serum amyloid A are associated independently with functional impairment in patients with and without peripheral arterial disease (PAD). Methods and Results— Participants were 370 men and women with PAD (ankle brachial index Conclusions— Higher D-dimer levels are associated with poorer functioning among individuals with and without PAD. Higher CRP levels were associated with poorer 6-minute walk performance and a lower summary performance score among participants with PAD but not among those without PAD. Additional study is needed to determine whether D-dimer and CRP are involved in the pathophysiology of functional impairment or whether they are simply sensitive markers of the extent of systemic atherosclerosis.

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