Offloading devices for neuropathic foot ulcers in adult persons with type 1 or type 2 diabetes: a rapid review with meta-analysis and trial sequential analysis of randomized controlled trials.

INTRODUCTION

Healing time for neuropathic planter foot ulcers (NPFUs) in persons with diabetes may be reduced through use of non-removable fiberglass total contact casting (F-TCC) compared with removable cast walkers (RCWs), although the evidence base is still growing.

RESEARCH DESIGN AND METHODS

We conducted a rapid review and systematically searched for, and critically assessed, randomized controlled trials (RCTs) that compared the efficacy of F-TCC versus RCW, focusing on the time to ulcer healing in adult persons (18+ years) with NPFUs and type 1 or type 2 diabetes. We meta-analysed the mean differences and associated 95% CIs using an inverse variance, random-effects model. We also conducted a trial sequential analysis (TSA) to assess if the available evidence is up to the required information size for a robust conclusion. We assessed and quantified statistical heterogeneity between the included studies using the statistic.

RESULTS

Out of 102 retrieved citations, five RCTs met the eligibility criteria. Participants' inclusion in relation to stage of ulcer was highly variable as was peripheral neuropathy complicating comparisons. F-TCC appeared to present a shorter ulcer healing time (-5.42 days, 95% CI -9.66 days to -1.17 days; 9.9%; 5 RCTs; 169 participants) compared with RCW. This finding was supported by the TSA.

CONCLUSIONS

There is limited evidence from RCTs to suggest that F-TCC has a shorter ulcer healing time compared with RCW among adults with diabetic NPFUs. Properly designed and conducted RCTs are still required for a stronger evidence base.