A computerized systematic search was conducted in seven databases: Web of Science, PubMed, Embase, Science Direct, CNKI, Wanfang Data, and VIP. The search period was from the inception of each database to December 2025. The research topics were identified as "offloading intervention" and "diabetic high-risk foot".
Taking the pubmed search strategy as an example:
#1 "Diabetic Angiopathies"[Mesh] OR "Diabetic Angiopathy"[Title/Abstract] OR "Diabetic Vascular Diseases"[Title/Abstract] OR "Peripheral Arterial Disease"[Mesh] OR "Lower Limb Ischemia"[Title/Abstract]
#2 "Diabetic Neuropathies"[Mesh] OR "Diabetic Neuropathy"[Title/Abstract] OR "Diabetic Peripheral Neuropathy"[Title/Abstract]
#3 "Foot"[Mesh] OR "Foot Deformities"[Mesh] OR "Biomechanical Phenomena"[Mesh] OR "Gait"[Mesh] OR "Plantar Pressure"[Title/Abstract] OR "Foot Deformities"[Title/Abstract] OR "Charcot Foot"[Title/Abstract] OR "Hammer Toe"[Title/Abstract] OR "Hallux Valgus"[Title/Abstract] OR "Hindfoot"[Title/Abstract] OR "Midfoot"[Title/Abstract] OR "Forefoot"[Title/Abstract] OR "Metatarsal Head"[Title/Abstract] OR "Phalanges"[Title/Abstract] OR "Calcaneus"[Title/Abstract]
#4 "Diabetic Foot"[Mesh] OR "Foot Ulcer"[Mesh] OR "High-Risk Foot"[Title/Abstract] OR "Pre-Ulcerative Foot"[Title/Abstract]
#5 "Shoes"[Mesh] OR "Orthotic Devices"[Mesh] OR "Offloading Shoes"[Title/Abstract] OR "footwear"[Title/Abstract] OR "Removable cast walker"[Title/Abstract] OR "Total contact cast"[Title/Abstract] OR "cushioned insole"[Title/Abstract] OR "rigid rocker"[Title/Abstract] OR "pressure relief"[Title/Abstract] OR "Prescription footwear"[Title/Abstract]
#6 (#1 OR #2 OR #3) AND #4 AND #5
Taking the cnki search strategy as an example:
#1 “糖尿病高危足” OR “溃疡前糖尿病足” “糖尿病血管病变” OR “糖尿病血管并发症” OR “糖尿病大血管病变” OR “糖尿病微血管病变” OR “糖尿病性周围血管病变” OR “下肢缺血” OR “糖尿病动脉疾病”
#2 “糖尿病神经病变” OR “糖尿病神经并发症” OR “糖尿病性周围神经病变” OR “糖尿病性感觉神经病变” OR “糖尿病性自主神经病变” OR “足底压力” OR “机械应力” OR “足部生物力学” OR “足部形” OR “夏科足” OR “锤状趾” OR “爪形趾” OR “拇外翻” OR “跖骨头突出” OR “峰值压力” OR “截肢” OR “生物力学”
#3 “减压鞋” OR “半鞋” OR “处方鞋” OR “硬性摇底” OR “缓冲鞋垫” OR “硬摇杆鞋” OR “全长鞋” OR “全接触鞋垫” OR “预制矫形鞋垫” OR “横制鞋垫” OR “村垫” OR “气垫” OR “羊毛垫” OR “凹点鞋垫” OR “鞋类合脚度” OR “骨科鞋”
#4 “矫形器” OR “足弓杯” OR “内侧足弓形状” OR “可拆卸矫形器” OR “踝足矫形器” OR “全接触石膏”
#5 (#1 OR #2 OR #3) AND #4 AND #5
1.4 Literature Screening and Data Extraction
Literature screening was independently conducted by two researchers who had received evidence-based training and passed relevant assessments. Based on the inclusion and exclusion criteria, screening was performed using Zotero 7.0 reference management software. In case of disagreements, a discussion with a third reviewer was held to decide on inclusion. The data extracted from the literature included author(s), country, year of publication, study population, sample size, type of offloading intervention, intervention duration, and outcome measures.