Using Smartphone Sensor Technology to Characterize Ambulatory Patterns of Participants With Peripheral Artery Disease


Supervised exercise training (SET) improves functioning and quality of life for patients with peripheral artery disease (PAD). However, these programs have primarily been conducted in research settings, thus the physical activity that patients complete in real-world settings (urban and rural hospitals) is unknown. The proposed project will use a novel smartphone app called Daynamica, to summarize patients activity patterns and also to enhance patient-study staff communication and subsequently improve PAD patient health outcomes.

I'm interested

40 Years and over
This study is NOT accepting healthy volunteers
Inclusion Criteria:

• Diagnosis of atherosclerotic PAD and referred to hospital-based SET
• Ability to complete an evaluation of physical function and walk on a treadmill
• Resting ankle-brachial index (ABI) of ≤0.90 or stenosis ≥50% in a peripheral vessel or those with lifestyle limiting vascular-related claudication
• Those with a resting ABI of 0.91-0.99 (borderline) who have completed an exercise-ABI assessment with a >20% drop compared to resting values
• Those with ABI >1.40 who have had an abnormal toe-brachial index of ≤0.70
Exclusion Criteria:

• Lower extremity amputation(s) which interfere(s) with walking on the treadmill.
• Individuals with critical limb ischemia defined by ischemic rest pain or ischemic ulcers/gangrene on the lower extremities
• PAD of non-atherosclerotic nature (e.g., fibromuscular dysplasia, irradiation, endofibrosis)
• Females who are pregnant
• Coronary artery bypass grafts or major surgical procedures within 6 months prior to screening
• Individuals whose walking exercise is primarily limited by symptoms of chronic obstructive pulmonary disease, angina, or heart failure
• Individuals who have had a myocardial infarction within 3 months prior to screening
• Individuals who have had a transient ischemic attack or stroke 3 months prior to screening
• Individuals with uncontrolled hypertension (≥180 systolic or ≥100 diastolic resting blood pressure) during screening
• Poorly controlled diabetes defined as glycated hemoglobin >12%
• Abnormal results of blood work not conducive to safely participating in an exercise trial (e.g., anemic, electrolyte abnormalities)
• Inability to speak English
• Other clinically significant cardiovascular, pulmonary, renal, endocrine, hepatic, neurological, psychiatric, immunological, gastrointestinal, hematological, or metabolic disease that is, in the opinion of the study team, not stabilized or may otherwise confound the results of the study

Other: Accelerometry, Other: Daynamica app

Peripheral Artery Disease

peripheral artery disease, accelerometer, smartphone, supervised exercise therapy

Ryan Mays, PhD, MPH, MS -
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