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Risk factors associated with the failure of a venous leg ulcer to heal.

BACKGROUND
Venous leg ulcers afflict a significant portion of the population. The most popular form of therapy for venous leg ulcers is a compression bandage (eg, Unna boot), a therapy that is frequently unsuccessful.


OBJECTIVE
To describe risk factors associated with the failure of a wound to heal when treated with a limb-compression bandage for 24 weeks.


DESIGN
A retrospective cohort study.


SETTING
Single-center outpatient specialty clinic at an academic medical center.


PARTICIPANTS
Two hundred sixty consecutive patients with chronic venous leg ulcers.


MAIN OUTCOME MEASURE
The magnitude of the effect of a given risk factor on the probability that a wound will heal within 24 weeks of care.


RESULTS
Based on an assessment of leg wounds during initial office visits, we observed that the failure of a wound to heal within 24 weeks was significantly associated with larger wound area, measured in square centimeters (odds ratio [OR], 1.19; 95% confidence interval [CI], 1.11-1.27), duration of the wound in months (OR, 1.09; 95% CI, 1.04-1.16), history of venous ligation or venous stripping (OR, 4.58; 95% CI, 1.84-11.36), history of hip or knee replacement surgery (OR, 3.52; 95% CI, 1.12-11.08), ankle brachial index of less than 0.80 (OR, 3.52; 95% CI, 1.12-11.08), and the presence of fibrin on more than 50% of the wound surface (OR, 3.42; 95% CI, 1.38-8.45).


CONCLUSIONS
Several risk factors are associated with the failure of a patient's venous leg ulcer to heal while using limb-compression therapy. It is prudent to consider these factors when referring a patient to a wound care subspecialists or for alternative therapies.