老年2型糖尿病患者糖尿病足与认知障碍的 影响因素研究

A Study on Influencing Factors for Diabetic Foot and Cognitive Impairment in Elderly Patients with Type 2 Diabetes

摘要: 糖尿病足和认知障碍是糖尿病的两大致残性并发症，严重威胁老年患者的生活质量和生存预后。近年研究发现，这两种并发症常共存于同一患者，且相互影响、互为恶化。老年糖尿病足患者认知障碍患病率较高，认知功能在各认知领域(记忆、执行功能、注意、处理速度)均显著低于同年龄段正常人。发病机制涉及慢性高血糖、胰岛素抵抗、血管病变、神经炎症、神经血管单元结构破坏等多重通路的交互作用。影响因素可归纳为人口学因素(高龄、低教育水平、男性)、代谢指标(病程长、HbA1c升高)、糖尿病并发症(周围神经病变、外周动脉疾病、微血管并发症、截肢史)、心理行为因素(抑郁症状、自我管理能力下降)以及生物学标志物(炎症因子、血管损伤标志物)。现有研究多为横断面或小样本队列，证据一致性不足，争议点集中于性别与认知障碍的关联、截肢对认知的独立影响等；同时缺乏针对中国老年人群的大样本前瞻性数据，未明确两者因果时序与干预靶点。本文在批判性整合现有证据基础上，提出更具针对性的未来研究方向，为老年糖尿病患者并发症精准防控提供理论依据与实践指导。

Abstract: Diabetic foot and cognitive impairment are two major disabling complications of diabetes, posing a serious threat to the quality of life and survival prognosis of elderly patients. Recent studies have found that these two complications often coexist in the same patient and interact with each other, exacerbating one another. Elderly patients with diabetic foot have a high prevalence of cognitive impairment, and their cognitive function is significantly lower than that of healthy individuals of the same age across all cognitive domains (memory, executive function, attention, and processing speed). The pathogenesis involves the interaction of multiple pathways, including chronic hyperglycemia, insulin resistance, vascular lesions, neuroinflammation, and structural disruption of neurovascular units. Influencing factors can be categorized into demographic factors (advanced age, low educational attainment, male gender), metabolic indicators (long disease duration, elevated HbA1c), diabetic complications (peripheral neuropathy, peripheral arterial disease, microvascular complications, history of amputation), psychobehavioral factors (depressive symptoms, impaired self-management), and biological markers (inflammatory factors, markers of vascular damage). Most existing studies are cross-sectional or small-sample cohorts with insufficient evidence consistency. Controversies focus on the association between gender and cognitive impairment, the independent effect of amputation on cognition, etc. Meanwhile, there is a lack of large-sample prospective data targeting the elderly Chinese population, and the causal timeline and intervention targets between the two complications have not been clarified. Based on the critical integration of existing evidence, this paper puts forward more targeted future research directions to provide theoretical basis and practical guidance for the precise prevention and control of complications in elderly diabetic patients.