Evaluation of two wound measurement methods in a multi-center, controlled study

Area of Science:

• Wound healing research
• Medical imaging analysis
• Clinical trial methodology

Background:

• Accurate wound size measurement is essential for assessing healing progress and treatment efficacy.
• Traditional methods range from simple rulers to advanced automated image analysis.
• Evaluating new measurement techniques is vital for improving clinical trial data quality.

Purpose of the Study:

• To evaluate the predictability and accuracy of two wound size measurement systems.
• To compare computer digitization of color slide photographs (photo method) versus acetate tracings (tracing method).
• To assess the suitability of these methods for large, multicenter clinical trials.

Main Methods:

• A multicenter, double-blind evaluation involving 450 paired comparisons (900 observation points) of lower extremity ulcers.
• Weekly wound size measurements over at least four weeks using both photo and tracing methods.
• Computer digitization of color slide photographs and acetate tracings for wound surface area determination.

Main Results:

• Both photo and tracing methods showed highly similar wound surface area measurements, with a correlation coefficient of 0.97.
• Low standard deviations (10% to 20%) were observed, stratified by wound size and study center.
• Inter-site variability contributed minimally (5.4%) to the total observed variability.

Conclusions:

• Both the photo method and the tracing method are reliable and accurate for measuring wound size.
• These methods can be effectively utilized in large, multicenter clinical trials to evaluate patient response to wound healing therapies.
• The findings support the use of these digitized methods for consistent and comparable wound assessment across different study sites.