【作者】 刘华梅；

【导师】 张志坚；

【作者基本信息】 福建医科大学 ， 内科学， 2008， 硕士

【摘要】 目的:通过对福州城区进行非酒精性脂肪肝(Non-alcoholic Fatty Liver Disease,NAFLD)的流行病学调查,分析福州地区NAFLD的危险因素及患病率;初探游离脂肪酸(Free fatty acids, FFA)在NAFLD发病中的意义,探讨NAFLD患者中胰岛素抵抗与FFA的关系,为NAFLD的发病机制和防治提供新的理论依据。方法:第一部分采用随机多级分层整群抽样的方法对福州地区2条街道16岁以上居民进行调查。内容包括问卷、体格检查、生化检查、肝脏彩超检查;第二部分采用病例对照方法选出NAFLD组和对照组,除了前面的内容,还用ELISA法测血清胰岛素(Insulin,INS)、FFA,。结果:2850名居民接受了完整调查,此次调查对象约占福州城区人口的17.59/10000人。研究对象中男性1350人,女性(不包括孕妇)1500人,男女之比为1:1.11。年龄16~82岁,平均(52.40±16.20)岁,男女间年龄差异无统计学意义。彩超共检出脂肪肝729例,占25.58%,其中酒精性脂肪肝、可疑酒精性脂肪肝、NAFLD患病率分别占17.28%、3.43%、79.29%。经过性别、年龄调整后,脂肪肝患病率为25.58%,故NAFLD、酒精性脂肪肝、可疑酒精性脂肪肝的患病率分别为20.28%、4.42%、0.88%。NAFLD患病率随年龄增长而增加,55岁以前男性NAFLD患病率显著高于女性,χ2=25.708,P<0.001;而55岁后女性脂肪肝患病率显著高于男性,χ2=4.320,P<0.05。NAFLD组体重指数(Body mass index, BMI)、腰围、血压、空腹血糖(Fasting blood glucose, FBG)、甘油三酯(Triglycerides, TG)、总胆固醇(Total cholesterol, TC)、低密度脂蛋白胆固醇(Light density lipoprotein-cholesterol, LDL-C)显著高于非脂肪肝组(所有P<0.001),高密度脂蛋白胆固醇(High density lipoprotein-Cholesterol, HDL-C)水平显著低于非脂肪肝组(P<0.001);肥胖、糖尿病、高血压病、血脂异常和肝功能异常发生率均显著高于非脂肪肝组(所有P<0.001)。二分类变量Logistic回归分析显示:腰围、BMI、HDL-C、TG、FBG、腰臀比(Waist hip ratio,WHR)、糖尿病、高血压病、肝功能异常等9项因子与NAFLD密切相关。NAFLD患者中FFA水平高于正常对照组(P<0.01),差异有统计学意义。NAFLD患者中FFA水平与胰岛素敏感度(Insulin sensitivity index,ISI)呈显著负相关,FFA水平与胰岛素抵抗密切相关。结论:1、福州城区脂肪肝的患病率为25.58%,其中以NAFLD(20.28%)为主。2、高血压病、2型糖尿病、肝功能异常、FBG、WHR、TG、BMI及腰围与NAFLD呈正相关,是其危险因素;HDL-C与NAFLD呈负相关,是其保护因素。3、FFA与NAFLD密切相关, NAFLD患者中IR与FFA呈负相关。更多还原

【Abstract】 Objective To investigate the prevalence and major risk factors of non-alcoholic fatty liver(NAFLD) among adult residents in Fuzhou, explore the role of free fatty acids in NAFLD and the relationship between insulin resistance and the free fatty liver(FFA) in NAFLD patients, and provide the new theory for the pathogenesis and prevention of NAFLD.Methods In first part, a cross-sectional survey with multiple-stage stratified cluster and random sampling was performed. All residents aged 16 years and above were invited to participate in the survey; they came from 2 streets of Fuzhou. Ques-tionnaire, physical examination, serum lipid-profile, 75 gram oral glucose tolerance test, and ultrasonographic examination of liver were undertaken; in second part, case-control study was perfoemed, NAFLD and conctol group, all the above were undertaken, also including serum insulin, FFA by ELISA. Analysis of data was performed by SPSS13.0 for Windows statistical package.Results A total of 2850 adult residents took part in the survey,which was 87.31% of residents of the investigated communities and 17.59/10000 of Fuzhou municipal residents. Of the 2850, 1350 were males and 1500 were females. The mean age of the participants was 52.40±16.20 years and ranged from 16~82 years. Fatty liver was detected with ultrasound examination in 729 participants(25.58%),among which 17.28% had alcoholic fatty liver, 3.43% had suspected alcoholic fatty liver, and 79.29% had NAFLD.The age-adjusted, sex-adjusted prevalence of fatty liver in Fuzhou residents was 25.58%, the prevalence of alcoholic fatty liver,suspicious alcoholic fatty liver,and NAFLD in Fuzhou residents were 4.42%, 0.88%, and 20.28% respectively. The prevalence of NAFLD was increased with aging in males and in females.Among participants younger than 55 years,the prevalence of NAFLD in males was significantly higher than that in females(χ2= 25.708, P<0.001), but in participants older than 55 years the case was just the opposite, higher in females(χ2= 4.320, P<0.05). The body mass index(BMI), waist circumference, blood pressure, fasting blood glucose level, triglyceride(TG), Total cholesterol(TC), low-density lipoprotein cholesterol(LDL-C), and the incidence of obesity, diabetes2 mellitus, hypertension, dyslipidemia in NAFLD group were significantly higher than those in the group without fatty liver(all P<0.001), but the high-density lipoprotein cholesterol(HDL-C) level was lower in NAFLD group (P<0.001). Logistic regression analysis demonstrated that the prevalence of fatty liver was only closely correlated to nine factors, including waist circumference, WHR, BMI, FBG, TG, hypertension, abnormal hepatic function and diabetes mellitus. The level of FFA in NAFLD patients was higher than that of the control group, P<0.01, the difference was statistically significant. In NAFLD patients FFA levels was significantly negatively correlated with insulin sensitivity index(ISI), the level of FFA was positively related to insulin resistance.Conclusion 1. The prevalence of fatty liver among residents in Fuzhou is 25.58%, and NAFLD(20.28%) is the major type. 2.The hypertension, type 2 diabetes, TG, waist circumference, BMI, FBG, WHR and abnormal hepatic function are positively related to NAFLD,which are risk factors; HDL-C is negatively correlated with NAFLD,which is protective factor; 3. FFA concentration is closely associated with NAFLD, in NAFLD patients FFA is positively related to IR.更多还原