Objective For prevention of obesity in Chinese population, it is necessary to definethe optimal range of healthy weight and the appropriate cut-off points of BMI and waistcircumference for Chinese adults. The Worki...Objective For prevention of obesity in Chinese population, it is necessary to definethe optimal range of healthy weight and the appropriate cut-off points of BMI and waistcircumference for Chinese adults. The Working Group on Obesity in China under the supportof International Life Sciences Institute Focal Point in China organized a meta-analysis on therelation between BMI, waist circumference and risk factors of related chronic diseases (e. g.,high diabetes, diabetes mellitus, and lipoprotein disorders). Methods 13 population studiesin all met the criteria for enrollment, with data of 239 972 adults (20-70 year) surveyed inthe 1990s. Data on waist circumference was available for 111411 persons and data on serumlipids and glucose were available for more than 80 000. The study populations located in21provinces, municipalities and autonomous regions in China's Mainland as well as inTaiwan. Each enrolled study provided data according to a common protocol and uniformformat. The Center for data management in Department of Epidemiology, Fu Wai Hospitalwas responsible for statistical analysis. Results and conclusion The prevalence ofhypertension, diabetes, dyslipidemia and clustering of risk factors all increased withincreasing levels of BMI or waist circumference. BMI at 24 with best sensitivity andspecificity for identification of the risk factors, was recommended as the cut-off point foroverweight, BMI at 28 which may identify the risk factors with specificity around 90 % wasrecommended as the cut-off point for obesity. Waist circumference beyond 85 cm for menand beyond 80 cm for women were recommended as the cut-off points for central obesity.Analysis of population attributable risk percent illustrated that reducing BMI to normalrange (<24) could prevent 45%-50% clustering of risk factors. Treatment of obese persons(BMI≥28)with drugs could prevent 15%-17% clustering of risk factors. The waistcircumference controlled under 85 cm for men and under 80 cm for women, could prevent47%-58% clustering of risk fact展开更多
Objective To verify the optimal cut-off points for overweight and obesity in Chinese adults based on the relationship of baseline body mass index (BMI) to all-cause mortality, and incidence of cardiovascular diseases...Objective To verify the optimal cut-off points for overweight and obesity in Chinese adults based on the relationship of baseline body mass index (BMI) to all-cause mortality, and incidence of cardiovascular diseases from pooled data of Chinese cohorts. Methods The prospective study data of existing cohort studies in China were collected, and the age-adjusted all-cause mortality stratified by BMI were estimated. The similar analysis was repeated after excluding deaths within the first three years of follow-up and after excluding smokers. The incidence of age-adjusted coronary heart disease (CHD) and stroke stratified by BMI were also analyzed. Multiple Cox regression coefficients of BMI for the incidence of CHD and stroke after controlling other risk factors were pooled utilizing the methods of weighting by inverse of variance to reveal whether BMI had independent effect and its strength on the incidence of CHD and stroke. Results The data of 4 cohorts including 76 227 persons, with 745 346 person-years of follow-up were collected and analyzed. The age-adjusted all-cause mortality stratified by BMI showed a U-shaped curve, even after excluding deaths within the first three years of follow-up and excluding smokers. Age-adjusted all-cause mortality increased when BMI was lower than 18.5 and higher than 28. The incidence of CHD and stroke, especially ishemic stroke increased with increasing BMI, this was consistent with parallel increasing of risk factors. Cox regression analysis showed that BMI was an independent risk factor for both CHD and stroke. Each amount of 2 kg/m2 increase in baseline BMI might cause 15.4%, 6.1% and 18.8 % increase in relative risk of CHD, total stroke and ischemic stroke. Reduction of BMI to under 24 might prevent the incidence of CHD by 11% and that of stroke by 15 % for men, and 22 % of both diseases for women. Conclusion BMI ≤18.5, 24-27.9 and ≥28 (kg/m2) is the appropriate cut-off points for underweight, overweight and obesity in Chinese adults.展开更多
目的:探讨血清胱抑素C(cystatin C,Cys-C)检测在糖尿病肾病(DN)患者肾功能评价中的诊断价值。方法:经临床及肾活检确诊的2型糖尿病、DN患者83例。免疫比浊法测定血清Cys-C浓度。同时测定血肌酐水平(SCr)、BMI数值、肾小管功能指标(NAG酶...目的:探讨血清胱抑素C(cystatin C,Cys-C)检测在糖尿病肾病(DN)患者肾功能评价中的诊断价值。方法:经临床及肾活检确诊的2型糖尿病、DN患者83例。免疫比浊法测定血清Cys-C浓度。同时测定血肌酐水平(SCr)、BMI数值、肾小管功能指标(NAG酶,RBP、尿渗量)、尿蛋白水平、血清白蛋白、尿酸水平、同位素99mTc-DTPA测定肾小球滤过率(GFR)。分析不同肾功能状态下Cys-C,SCr、MDRD公式与ECT-GFR的相关性。进一步根据肾小管功能指标、蛋白尿程度、血清白蛋白水平、代谢指标(血清尿酸、BMI)分组,分析Cys-C、SCr与GFR的相关性差别。以ECT-GFR为标准,作Cys-C、SCr的受试者工作特性曲线(receiver operator characteristic curve,ROC),并求其曲线下面积(area under the curve,AUC)。结果:(1)Cys-C、SCr与ECT-GFR的Pearson相关系数r分别为-0.740和-0.663(P<0.01),Cys-C与GFR的相关性较SCr更好。GFR≤60ml/min时,Cys-C、MDRD-GFR、SCr与GFR的相关系数r分别为-0.798,0.760,-0.716(P<0.01),Cys-C与GFR的相关性优于SCr和MDRD公式;GFR>90ml/min时,Cys-C、SCr与GFR的相关系数r分别为-0.561vs-0.465(P<0.05)。Cys-C与GFR的相关性优于SCr。(2)患者肾小管功能受损状态下:NAG酶>20u/g.cr时,Cys-C、SCr与GFR的相关系数r分别为-0.660vs-0.595(P<0.01);RBP>2mg/L时,r值分别为-0.672vs-0.635(P<0.01);尿渗量≤600mOsm/kg.H2O时,r值分别为-0.696vs-0.663(P<0.01)。Cys-C与GFR的相关性均较SCr更好。(3)尿蛋白>1g/24h时,Cys-C、SCr与GFR的相关系数r分别为-0.704vs-0.649(P<0.01)。血清白蛋白≤35g/L时,r值分别为-0.635vs-0.581(P<0.01)。Cys-C与GFR的相关性均较SCr更好。(4)不同血清尿酸、BMI状态下,Cys-C与GFR的相关系数r值不受影响。ROC中曲线下面积(AUC),Cys-C、SCr分别为0.915vs0.902(P<0.01),仍以Cys-C更灵敏和特异。结论:DN患者各期(包括早期高灌注期、肾功能损害期),Cys-C与GFR之间的相关性优于SCr、MDRD公式。DN患者出现肾小管功能损害时,Cys-C与GFR展开更多
Objective To evaluate the sensitivity and specificity of body mass index (BMI), waist circumference (WC) and waist-to-hip ratio (WHR) measurements in diagnosing abdominal visceral obesity. Methods BMI, WC, and WHR wer...Objective To evaluate the sensitivity and specificity of body mass index (BMI), waist circumference (WC) and waist-to-hip ratio (WHR) measurements in diagnosing abdominal visceral obesity. Methods BMI, WC, and WHR were assessed in 690 Chinese adults (305 men and 385 women) and compared with magnetic resonance imaging (MRI) measurements of abdominal visceral adipose tissue (VA). Receiver operating characteristic (ROC) curves were generated and used to determine the threshold point for each anthropometric parameter. Results 1) MRI showed that 61.7% of overweight/obese individuals (BMI≥25 kg/m2) and 14.2% of normal weight (BMI<25 kg/m2) individuals had abdominal visceral obesity (VA≥100 cm2). 2) VA was positively correlated with each anthropometric variable, of which WC showed the highest correlation (r=0.73-0.77, P<0.001). 3) The best cut-off points for assessing abdominal visceral obesity were as followed: BMI of 26 kg/m2, WC of 90 cm, and WHR of 0.93, with WC being the most sensitive and specific factor. 4) Among subjects with BMI≥28 kg/m2 or WC≥95 cm, 95% of men and 90% of women appeared to have abdominal visceral obesity. Conclusion Measurements of BMI, WC, and WHR can be used in the prediction of abdominal visceral obesity, of which WC was the one with better accuracy.展开更多
文摘Objective For prevention of obesity in Chinese population, it is necessary to definethe optimal range of healthy weight and the appropriate cut-off points of BMI and waistcircumference for Chinese adults. The Working Group on Obesity in China under the supportof International Life Sciences Institute Focal Point in China organized a meta-analysis on therelation between BMI, waist circumference and risk factors of related chronic diseases (e. g.,high diabetes, diabetes mellitus, and lipoprotein disorders). Methods 13 population studiesin all met the criteria for enrollment, with data of 239 972 adults (20-70 year) surveyed inthe 1990s. Data on waist circumference was available for 111411 persons and data on serumlipids and glucose were available for more than 80 000. The study populations located in21provinces, municipalities and autonomous regions in China's Mainland as well as inTaiwan. Each enrolled study provided data according to a common protocol and uniformformat. The Center for data management in Department of Epidemiology, Fu Wai Hospitalwas responsible for statistical analysis. Results and conclusion The prevalence ofhypertension, diabetes, dyslipidemia and clustering of risk factors all increased withincreasing levels of BMI or waist circumference. BMI at 24 with best sensitivity andspecificity for identification of the risk factors, was recommended as the cut-off point foroverweight, BMI at 28 which may identify the risk factors with specificity around 90 % wasrecommended as the cut-off point for obesity. Waist circumference beyond 85 cm for menand beyond 80 cm for women were recommended as the cut-off points for central obesity.Analysis of population attributable risk percent illustrated that reducing BMI to normalrange (<24) could prevent 45%-50% clustering of risk factors. Treatment of obese persons(BMI≥28)with drugs could prevent 15%-17% clustering of risk factors. The waistcircumference controlled under 85 cm for men and under 80 cm for women, could prevent47%-58% clustering of risk fact
基金This project is supported by China Roche Pharmaceuticals.
文摘Objective To verify the optimal cut-off points for overweight and obesity in Chinese adults based on the relationship of baseline body mass index (BMI) to all-cause mortality, and incidence of cardiovascular diseases from pooled data of Chinese cohorts. Methods The prospective study data of existing cohort studies in China were collected, and the age-adjusted all-cause mortality stratified by BMI were estimated. The similar analysis was repeated after excluding deaths within the first three years of follow-up and after excluding smokers. The incidence of age-adjusted coronary heart disease (CHD) and stroke stratified by BMI were also analyzed. Multiple Cox regression coefficients of BMI for the incidence of CHD and stroke after controlling other risk factors were pooled utilizing the methods of weighting by inverse of variance to reveal whether BMI had independent effect and its strength on the incidence of CHD and stroke. Results The data of 4 cohorts including 76 227 persons, with 745 346 person-years of follow-up were collected and analyzed. The age-adjusted all-cause mortality stratified by BMI showed a U-shaped curve, even after excluding deaths within the first three years of follow-up and excluding smokers. Age-adjusted all-cause mortality increased when BMI was lower than 18.5 and higher than 28. The incidence of CHD and stroke, especially ishemic stroke increased with increasing BMI, this was consistent with parallel increasing of risk factors. Cox regression analysis showed that BMI was an independent risk factor for both CHD and stroke. Each amount of 2 kg/m2 increase in baseline BMI might cause 15.4%, 6.1% and 18.8 % increase in relative risk of CHD, total stroke and ischemic stroke. Reduction of BMI to under 24 might prevent the incidence of CHD by 11% and that of stroke by 15 % for men, and 22 % of both diseases for women. Conclusion BMI ≤18.5, 24-27.9 and ≥28 (kg/m2) is the appropriate cut-off points for underweight, overweight and obesity in Chinese adults.
文摘目的:探讨血清胱抑素C(cystatin C,Cys-C)检测在糖尿病肾病(DN)患者肾功能评价中的诊断价值。方法:经临床及肾活检确诊的2型糖尿病、DN患者83例。免疫比浊法测定血清Cys-C浓度。同时测定血肌酐水平(SCr)、BMI数值、肾小管功能指标(NAG酶,RBP、尿渗量)、尿蛋白水平、血清白蛋白、尿酸水平、同位素99mTc-DTPA测定肾小球滤过率(GFR)。分析不同肾功能状态下Cys-C,SCr、MDRD公式与ECT-GFR的相关性。进一步根据肾小管功能指标、蛋白尿程度、血清白蛋白水平、代谢指标(血清尿酸、BMI)分组,分析Cys-C、SCr与GFR的相关性差别。以ECT-GFR为标准,作Cys-C、SCr的受试者工作特性曲线(receiver operator characteristic curve,ROC),并求其曲线下面积(area under the curve,AUC)。结果:(1)Cys-C、SCr与ECT-GFR的Pearson相关系数r分别为-0.740和-0.663(P<0.01),Cys-C与GFR的相关性较SCr更好。GFR≤60ml/min时,Cys-C、MDRD-GFR、SCr与GFR的相关系数r分别为-0.798,0.760,-0.716(P<0.01),Cys-C与GFR的相关性优于SCr和MDRD公式;GFR>90ml/min时,Cys-C、SCr与GFR的相关系数r分别为-0.561vs-0.465(P<0.05)。Cys-C与GFR的相关性优于SCr。(2)患者肾小管功能受损状态下:NAG酶>20u/g.cr时,Cys-C、SCr与GFR的相关系数r分别为-0.660vs-0.595(P<0.01);RBP>2mg/L时,r值分别为-0.672vs-0.635(P<0.01);尿渗量≤600mOsm/kg.H2O时,r值分别为-0.696vs-0.663(P<0.01)。Cys-C与GFR的相关性均较SCr更好。(3)尿蛋白>1g/24h时,Cys-C、SCr与GFR的相关系数r分别为-0.704vs-0.649(P<0.01)。血清白蛋白≤35g/L时,r值分别为-0.635vs-0.581(P<0.01)。Cys-C与GFR的相关性均较SCr更好。(4)不同血清尿酸、BMI状态下,Cys-C与GFR的相关系数r值不受影响。ROC中曲线下面积(AUC),Cys-C、SCr分别为0.915vs0.902(P<0.01),仍以Cys-C更灵敏和特异。结论:DN患者各期(包括早期高灌注期、肾功能损害期),Cys-C与GFR之间的相关性优于SCr、MDRD公式。DN患者出现肾小管功能损害时,Cys-C与GFR
文摘Objective To evaluate the sensitivity and specificity of body mass index (BMI), waist circumference (WC) and waist-to-hip ratio (WHR) measurements in diagnosing abdominal visceral obesity. Methods BMI, WC, and WHR were assessed in 690 Chinese adults (305 men and 385 women) and compared with magnetic resonance imaging (MRI) measurements of abdominal visceral adipose tissue (VA). Receiver operating characteristic (ROC) curves were generated and used to determine the threshold point for each anthropometric parameter. Results 1) MRI showed that 61.7% of overweight/obese individuals (BMI≥25 kg/m2) and 14.2% of normal weight (BMI<25 kg/m2) individuals had abdominal visceral obesity (VA≥100 cm2). 2) VA was positively correlated with each anthropometric variable, of which WC showed the highest correlation (r=0.73-0.77, P<0.001). 3) The best cut-off points for assessing abdominal visceral obesity were as followed: BMI of 26 kg/m2, WC of 90 cm, and WHR of 0.93, with WC being the most sensitive and specific factor. 4) Among subjects with BMI≥28 kg/m2 or WC≥95 cm, 95% of men and 90% of women appeared to have abdominal visceral obesity. Conclusion Measurements of BMI, WC, and WHR can be used in the prediction of abdominal visceral obesity, of which WC was the one with better accuracy.
