Peripheral artery disease is driven by the same plaque process that narrows the heart and neck arteries. That is the important framing: the risk factors for PAD are the risk factors for heart attack and stroke, and treating them is treating all three at once.
The factors you can change
Smoking
The single strongest modifiable risk factor for PAD, and more strongly associated with it than with coronary disease. It accelerates plaque formation, constricts vessels directly, and worsens the outcome of every treatment including bypass grafts and stents. Stopping has a larger effect on the course of PAD than anything else available. Building a quit plan →
Diabetes
Raises the risk substantially and changes its character: disease tends to be more distal — in the smaller vessels below the knee — and harder to treat with a procedure. Diabetes also frequently brings neuropathy with it, which removes the pain that would otherwise signal a problem, so PAD in diabetes is more often silent and more often first noticed as a wound. Why that combination is dangerous →
High blood pressure
Damages the arterial wall over time and accelerates plaque. Treating it is standard in PAD, with the target set individually.
High cholesterol
Drives the plaque itself. Statin therapy is standard in PAD — prescribed for its effect on cardiovascular events rather than only for the number on the lipid panel, which is why a normal result usually means the treatment is working rather than that it can stop.
Physical inactivity and weight
Both contribute, and both are modifiable. Structured walking has a specific role in claudication beyond general fitness. How that works →
The factors you cannot change
| Factor | Why it matters |
|---|---|
| Age | Prevalence rises steadily; risk is meaningful over 65, and over 50 with other factors |
| Family history | Contributes independently of the rest |
| Chronic kidney disease | Associated with more extensive and more distal disease, and with vessel calcification that makes the ABI harder to interpret |
| Known disease elsewhere | Coronary or carotid artery disease makes PAD substantially more likely — arterial disease is rarely confined to one region |
| Previous clot or inflammatory conditions | Some conditions raise vascular risk through other mechanisms |
The point people miss
A PAD diagnosis is not primarily a leg problem. It is a marker that the same process is very likely present in the heart and the brain, and the largest share of the harm PAD predicts is cardiovascular rather than limb-related. That is why the treatment plan contains medicines that do nothing for walking distance — they are aimed at the events you will not have. The full treatment map →
Who should consider being tested
Worth discussing an ankle-brachial index with your clinician if you:
- are over 65
- are over 50 with diabetes or a smoking history
- smoke or have smoked
- have diabetes, particularly with any foot problems
- have chronic kidney disease
- have known coronary or carotid disease
- have leg symptoms on walking, a non-healing foot wound, or a foot that is cooler than the other
The test takes about fifteen minutes and requires no preparation. Finding PAD when it is silent still changes medical treatment in ways that reduce heart attack and stroke risk. What the test involves →
Common questions
If I stop smoking now, does it help or is the damage done?
It helps, and it helps most in people who already have the diagnosis. Progression slows, procedures last longer, wounds heal better, and cardiovascular risk falls. Existing plaque is not usually reversed, but the trajectory changes substantially.
I have none of the risk factors. Can I still have PAD?
Yes, though it is less likely. And there are less common causes of reduced leg blood flow that do not involve plaque at all — popliteal entrapment in younger athletic people, for instance. Symptoms that fit the pattern deserve investigation regardless of the risk profile.
Does high cholesterol alone mean I will get PAD?
No. Risk factors shift probability; they do not determine outcome. Most people with raised cholesterol do not develop symptomatic PAD, and plenty of people with PAD have unremarkable cholesterol. Risk accumulates across factors rather than resting on any one.
Does diabetes change how PAD is treated?
It changes the assessment and the foot care more than the principles. Ankle pressures can read falsely normal because of vessel calcification, so toe pressures are used; disease is often more distal, which affects procedure choices; and daily foot inspection becomes considerably more important because reduced sensation hides injuries.
Where to go next
Sources
- National Heart, Lung, and Blood Institute. Peripheral Artery Disease.
- American College of Cardiology. 2024 Lower Extremity PAD Guideline.
- Society for Vascular Surgery. Peripheral Artery Disease.
- National Institute of Diabetes and Digestive and Kidney Diseases. Diabetes and Foot Problems.
Written by Tom Biernacki, DPM, FACFAS. Published 21 September 2026. General education, not medical advice.