Repeatability, Completion Time, and Predictive Ability of Four Diabetes-Related Foot Ulcer Classification Systems
Authors' conclusion
The WIfI score can be completed with substantial agreement between trained observers but was not predictive of 30-day amputation.
Study context
- Population
- Diabetes-related foot ulcers scored from photographs
- Participants
- 45 participants
- Comparison
- Wound Ischemia foot Infection (WIfI) vs University of Texas Wound Classification System (UTWCS) vs SINBAD vs Wagner classification systems
- Outcome
- Inter- and intra-observer reproducibility (Krippendorff's α), completion times, and ability to predict 30-day amputation
Methodological detailsphotograph-based scoring, three trained observers, two separate occasions
- Photograph-based scoring
- Three trained observers
- Two separate occasions
Main finding
As reported in the abstract
Inter- and intra-observer agreement (Krippendorff's α)
| Group | Value | Intra-observer α |
|---|---|---|
| WIfI | α 0.788 | >0.900 |
| UTWCS | α 0.306 | |
| SINBAD | α 0.516 | |
| Wagner | α 0.374 |
Value
WIfIα 0.788
UTWCSα 0.306
SINBADα 0.516
Wagnerα 0.374
Intra-observer α
WIfI>0.900
UTWCS— not stated in the abstract
SINBAD— not stated in the abstract
Wagner— not stated in the abstract
Further findings
Completion time — WIfI vs UTWCS, SINBAD and Wagner · WIfI took significantly longer
P < 0.001
Prediction of 30-day amputation (ROC AUC)
- None of the classifications were predictive of 30-day amputation
- P > 0.05 in all instances
Original publication
Repeatability, Completion Time, and Predictive Ability of Four Diabetes-Related Foot Ulcer Classification Systems. J Diabetes Sci Technol. Published 15 January 2021. doi:10.
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