Risk of Additional Diabetic Complications in Patients with Diabetic Foot

Understanding the Risk Profile

Peripheral neuropathy is present in 78% of patients who develop diabetic foot ulcers, making it the most common component cause 1, 2.
Peripheral arterial disease (PAD) coexists in up to 50% of patients with diabetic foot ulcers, representing neuro-ischemic disease rather than purely neuropathic ulcers 3.
Retinopathy is a recognized risk factor for diabetic foot complications, indicating parallel microvascular damage 2.
Nephropathy, particularly in patients on dialysis or post-transplant, significantly increases risk for foot complications and represents concurrent end-organ damage 2, 4.

Diabetic foot ulceration is associated with high levels of morbidity and mortality 5.
The lifetime incidence of diabetes-related foot ulceration is 19%-34%, with yearly incidence of 2% and recurrence rates of 40% within one year after healing and 65% within three years 5.

Poor glycemic control over years affects not only peripheral nerves but also accelerates atherosclerosis, leading to PAD in approximately half of diabetic foot patients 3.
The presence of PAD is an important risk factor for impaired wound healing and lower extremity amputation 3.

Chronic kidney disease, especially requiring dialysis, represents a major risk factor that clusters with diabetic foot disease 2, 4.
Patients on dialysis require the most intensive foot surveillance (every 1-3 months) due to their high-risk status 2.

Visual impairment from diabetic retinopathy is both a risk factor for foot complications and a concurrent complication 2, 4.
This creates a dangerous cycle where patients cannot adequately inspect their own feet for early problems 2.

Loss of protective sensation (LOPS) leads to insensitive and deformed feet with abnormal walking patterns 3.

Patients with a history of foot ulceration or amputation require examination every 1-3 months (IWGDF Category 3) 2, 3, 4.
This intensive schedule reflects the high risk of both recurrent foot problems and progression of other diabetic complications 3.

An interprofessional approach is recommended for individuals with foot ulcers and high-risk feet, including those on dialysis, with Charcot foot, or with history of prior ulcers or amputation 2.
Assessment should include glycemic control, cardiovascular status, renal function, and ophthalmologic evaluation 2, 4.

The IWGDF Risk Classification System stratifies patients from Category 0 (no neuropathy, annual screening) to Category 3 (neuropathy with history of ulcer/amputation, screening every 1-3 months) 3, 4, 6.
Category 3 patients represent those with the highest risk for both recurrent foot problems and concurrent diabetic complications 3.

Do not assume diabetic foot disease exists in isolation—it is a marker of systemic diabetic complications requiring comprehensive evaluation 2, 3.
Do not rely on symptoms alone—patients may have asymptomatic severe ischemia due to concurrent neuropathy masking pain 3.
Diabetic microangiopathy ("small vessel disease") is not the primary cause of ulcers or poor wound healing; focus on large vessel PAD and neuropathy 3.
Do not perform nerve decompression procedures as they do not prevent foot ulcers and are not recommended over standard care 1, 5, 7.