Evaluation of the Construct Validity of a Risk Assessment Instrument for Venous Leg Ulcer Recurrence

Area of Science:

• Vascular medicine
• Clinical assessment tools
• Ulcer recurrence prediction

Background:

• Venous leg ulcers (VLUs) pose a significant challenge due to high recurrence rates.
• Effective risk assessment tools are crucial for targeted interventions and improved patient outcomes.

Purpose of the Study:

• To evaluate the construct validity of an 8-item instrument designed to predict the risk of venous leg ulcer recurrence.
• To determine if the instrument accurately identifies individuals at higher risk for VLU recurrence.

Main Methods:

• Methodological study involving 37 adults with healed venous leg ulcers.
• Participants were followed for 12 months to assess recurrence.
• Construct validity was assessed using the area under the receiver operating characteristic curve (AUC) and the Hosmer-Lemeshow statistic.

Main Results:

• The instrument's total risk assessment score achieved an acceptable Area Under the Curve (AUC) of 0.824.
• The AUC remained consistent across 3- and 6-month follow-up assessments.
• The statistical evaluation indicated good predictive capability for the VLU recurrence risk instrument.

Conclusions:

• The validated risk assessment tool supports global application in guiding individualized interventions for venous leg ulcers.
• Utilizing the tool can help address modifiable risk factors and improve treatment concordance.
• The findings suggest the instrument can contribute to reducing venous leg ulcer recurrence rates.