摘要目的:分析中老年轻度认知障碍（MCI）人群血脂及胰岛素抵抗相关指标与认知评分的相关性。方法:本研究为横断面研究，连续选取2021年1月1日—7月31日在首都医科大学附属北京天坛医院健康管理中心进行体检且蒙特利尔认知功能量表（MoCA）评分≥18分的262例中老年人群为研究对象，根据认知功能和MoCA评分分为MCI组（143例）和认知正常组（119例）。收集两组基本资料、空腹血糖、甘油三酯（TG）、总胆固醇、载脂蛋白E（ApoE）基因型等临床指标，采用假设检验比较两组基本资料、血脂及胰岛素抵抗相关指标差异，采用Spearman相关性分析评估两组血脂及胰岛素抵抗相关指标与MoCA评分的相关性。结果:MCI组年龄及高血压、冠心病、糖尿病患者比例均显著高于认知正常组［（54.83±8.29）比（50.76±6.34）岁、37.76%比31.93%、4.20%比0.84%、16.08%比8.40%］（均 P<0.05）。MCI组血清TG升高（ r=-0.50，95% CI：-0.88~-0.12）、TG葡萄糖乘积指数（TyG）升高（ r=-0.75，95% CI：-1.29~-0.20）、TG高密度脂蛋白胆固醇比值（TG/HDL-C）升高（ r=-0.52，95% CI：-0.91~-0.13）均与MoCA评分呈负相关（均 P<0.05）；校正年龄、性别后，TG升高（ r=-0.39，95% CI：-0.75~-0.31）、TG/HDL-C升高（ r=-0.43，95% CI：-0.80~-0.05）仍与MoCA评分呈负相关（均 P<0.05）。认知正常组各指标与MoCA评分的相关性差异均无统计学意义（均 P>0.05）。MCI组携带ApoE ε4基因型人群TG升高与MoCA评分呈负相关（ r=-0.70，95% CI：-1.23~0.16， P=0.017）；携带ApoE ε2、ApoE ε3基因型人群TG与MoCA评分的相关性差异均无统计学意义（均 P>0.05）。 结论:中老年MCI人群血脂及胰岛素抵抗相关指标升高与认知评分呈负相关，这在携带ApoE ε4基因型人群中更为明显。

abstractsObjective:To analyze the correlation between related indexes of serum lipid and insulin resistance and cognitive impairment in middle-aged and elderly people with mild cognitive impairment (MCI).Methods:In this cross-sectional study, 262 middle-aged and elderly patients with a Montreal Cognitive Function Scale (MoCA) cognitive score greater than or equal to 18 points who underwent physical examination in the Health Management Center of Beijing Tiantan Hospital Affiliated to Capital Medical University from January 1 to July 31, 2021 were selected as subjects. According to the cognitive function and MoCA score, the patients were divided into MCI group (143 cases) and normal cognition group (119 cases). Basic data, fasting blood glucose, triglyceride (TG), total cholesterol, apolipoprotein E(ApoE) genotype and other clinical indicators were collected. Hypothesis test was used to compare the differences in basic data, related indicators of blood lipid and insulin resistance between the two groups. Spearman correlation analysis was used to analyze the correlation between related indicators of blood lipid and insulin resistance and MoCA score in the two groups.Results:The age and the proportion of patients with hypertension, coronary heart disease and diabetes in the MCI group were all significantly higher than those in normal cognition group [(54.83±8.29) vs (50.76±6.34) years, 37.76% vs 31.93%, 4.20% vs 0.84%, 16.08% vs 8.40%] (all P<0.05). The elevation of serum TG ( r=-0.50, 95% CI:-0.88--0.12), TG glucose product index (TyG) ( r=-0.75, 95% CI:-1.29--0.20) and TG to high-density lipoprotein cholesterol ratio (TG/HDL-C) ( r=-0.52, 95% CI:-0.91--0.13) were all negatively correlated with MoCA score (all P<0.05). After adjusting for age and gender, the elevation of TG ( r=-0.39, 95% CI:-0.75--0.31) and TG/HDL-C ( r=-0.43, 95% CI:-0.80--0.05) were both still negatively correlated with MoCA score (both P<0.05). There was no significant correlation between all indexes and MoCA scores in the normal cognition group (all P>0.05). The elevated TG was negatively correlated with MoCA score in the MCI group ( r=-0.70, 95% CI:-1.23-0.16, P=0.017). There was no significant correlation between elevated TG and MoCA score in patients carrying ApoE ε2 and ApoE ε3 genotypes in MCI group (all P>0.05). Conclusion:Elevated related indexes of blood lipids and insulin resistance are negatively correlated with cognitive scores in middle-aged and elderly people with MCI, and it′s more obvious in patients with ApoE ε4 genotype.