Offloading Matters: A Meta-Research Audit of Mechanical Validity in Trials Supporting the 2023 IWGDF Recommendations on Interventions to Enhance Healing of Foot Ulcers in People with DM

AimThis study aimed to evaluate and quantify the mechanical offloading methodological robustness of RCTs cited in the 2023 IWGDF interventions to enhance healing recommendations.MethodsA meta-research audit was conducted on 43 RCTs referenced in IWGDF guideline. A predefined framework assessed study characteristics, offloading system, adherence and activity monitoring, protocol implementation and symmetry, and mechanical offloading confounding risks. Trials were evaluated using a 10-point Offloading Quality Score (OQS), scale. Descriptive analyses and exploratory statistical tests) were performed.ResultsThe mean OQS was 2.07 (SD ± 2.83), with a median of 0 (IQR 0-4). Twenty-seven trials (62.79%) scored ≤2/10, while only three (7%) achieved scores ≥8/10. Offloading strategies were insufficiently described in 81.4% of studies, and adherence monitoring was absent in 88.4% of trials. Non-removable offloading devices were used in 7% of studies and were positively associated with higher OQS in regression analysis (β = 0.82, p < 0.001).ConclusionsMost RCTs underpinning the 2023 IWGDF recommendations demonstrate limited reporting and standardization of mechanical offloading. This may introduce unmeasured variability in mechanical exposure and could affect the interpretation of treatment effects. Future trials should standardize offloading protocols to improve internal validity and DFU research interpretation.