Association of Gghrelin Polymorphisms with Metabolic Syndrome in Han Nationality Chinese

Objective To investigate the association of ghrelin gene polymorphisms with metabolic syndrome in Han Nationality Chinese. Methods A total of 240 patients with metabolic syndrome and 427 adults aged above forty years were recruited. Genotypes were determined by polymerase chain reaction and restriction fragment length polymorphism analysis. Results The allelic frequency of the Leu72Met polymorphism was 17.3% in the patient group and 11.9% in the control group （x^2=7.36, P=0.007）. Metabolic syndrome was more prevalent among carriers of the Met72 variant （43.8 vs 33.1%, age- and sex-adjusted odds ratio=1.57, P=0.01）. No Arg51Gln variants were found in our study subjects. Conclusion Rather than being associated with its individual components, Leu72Met polymorphism is associated with metabolic syndrome in the Han Nationality Chinese. Arg51Gln polymorphism is rare in the Han Nationality Chinese.

Association of single nucleotide polymorphism of vitamin D receptor gene start codon and the suscepbility to prostate cancer in Han nationality in Hubei, China

Aim: To investigate the single nucleotide polymorphism of vitamin D receptor (VDR) gene start codon in the Han nationality in Hubei and its relationship to the susceptibility to prostate cancel (PCa). Methods: The VDR genotypes were determined by poly-merase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in 80 patients with PCa and 96 normal male controls from the Han nationality in Hubei, using endonuclease Fok. Direct sequencing was done in part of the PCR products. Results: The frequency distribution of Fok I alleles in this cohort all followed the Hardy-Weinberg equilibrium. The distribution of genotypes and alleles had no significant difference between PCa patients and the controls (P>0.05). Conclusion: There was no significant relationship between Fok I polymorphism of VDR gene start codon and PCa in the Han nationality in Hubei.

Study on the Relationship between 5-HttLPR Gene and BDNF Gene Polymorphism and Post-Traumatic Stress Disorder in Li and Han Nationality of Hainan Province

Objective: To investigate the correlation between 5-HTTLPR (5-and serotonin transporter linked polymer region) gene polymorphism and BDNF (brain derived neural factor) gene polymorphism and PTSD (post traumatic stress disorders) in Li and Han nationalities in Hainan Province. Methods: 167 Hainan Li PTSD patients, 141 Hainan Han PTSD patients and 158 healthy volunteers (control group) were investigated by ETI, caps, Toh, WCST, TMT and WAIS-RC. The polymorphisms of rs6265 locus of 5-HTTLPR and BDNF genes were detected by PCR (polymerase chain reaction) and page (polycylamide gel electrophoresis), and the correlation with PTSD was analyzed. Logistic regression analysis was used to analyze the influencing factors of PTSD. Results: The ETI score, total PTSD score and TMT time of Li PTSD patients were significantly higher than those of Han PTSD patients (P < 0.01). The comprehension, picture filling, picture arrangement, operation IQ and total IQ of WAIS-RC were significantly lower than those of Han PTSD patients (P < 0.01);The numbers of errors, TMT and Toh in WCST were significantly lower than those in Han PTSD patients (P < 0.01). There was no significant difference in the distribution of 5-HTTLPR genotype and allele between Li PTSD patients and control group (P > 0.05). SS genotype of 5-HTTLPR and (GA + AA) genotype of rs6265 locus may increase the risk of PTSD in Hainan Han population. AA and GA + AA genotypes at rs6265 locus may increase the risk of PTSD in Li population (P < 0.05). Among Li PTSD patients, the ETI score, PTSD total score, TMT time, Toh planning time and execution time of AA genotype at rs6265 locus were significantly higher than those of GG genotype;the total scores of comprehension and operation IQ, and Toh in WAIS-RC were significantly lower than those in GG genotype (P < 0.05). Among Han PTSD patients, the ETI score, PTSD total score and TMT time of SS genotype of 5-HTTLPR were significantly higher than those of LL genotype, and the comprehension, arithmetic and block diagram in WAIS-RC were significantly lower than those of LL genotype;The ETI score, PTSD total score and TMT time of patients with (GA + AA) genotype at rs6265 locus were also significantly higher than those of patients with GG genotype. The comprehension and block diagram in WAIS-RC were significantly lower than those of patients with GG genotype. The number of WCST errors in patients with AA genotype was significantly higher than those of patients with GG genotype, and the operational IQ in WAIS-RC was significantly lower than those of patients with GG genotype (P < 0.05). Conclusion: The LL genotype of 5-HTTLPR and the GG genotype of rs6265 locus are related to PTSD of Li and Han nationalities in Hainan, which are important protective factors for PTSD of Li and Han nationalities in Hainan.

Comparison on Detection Results of Pathogen Nucleic Acids for Bronchoalveolar Lavage Fluid of Lung Infection Infants Between Uighur Nationality and Han Nationality

Objective:To analyze the detection results of pathogen nucleic acids for bronchoalveolar lavage fluid(BALF)of lung infection infants from Uighur nationality and Han nationality.Methods:A retrospective analysis was performed on the 318 infants with lung infection who were admitted to the hospital from April 2018 to April 2019.According to their nationality,they were divided into Uighur nationality group(190 cases)and Han nationality group(128 cases).The BALF specimens were collected to test pathogen nucleic acid.The distribution and positive rates of[respiratory syncytial virus(RSV),adenovirus(ADV),influenza virus A(IFA),influenza virus B(IFB),parainfluenza virus type 1(PIV I),parainfluenza virus type 2(PIV II),parainfluenza virus type 3(PIV III)],bacteria(Streptococcus pneumoniae,Haemophilus influenzae,staphylococcus aureus,Pseudomonas aeruginosa,klebsiella pneumoniae),Mycoplasma pneumoniae(MP)and Chlamydia pneumoniae(CP)in both groups were observed and compared.Results:The virus detection for RSV,ADV and PIV III were on the top three in BALF from the children in both groups.The total positive rate of virus examination in Uighur nationality group was higher than that in Han nationality group(P<0.05).BALF in both groups was mainly on Streptococcus pneumoniae.The total positive rate of bacteria,MP and detection rate of chlamydia were higher in Uighur nationality group were higher than those in Han nationality group(P<0.05).Conclusion:The pathogen nucleic acid examination for bronchoalveolar lavage fluid in infants with lung viral infection is in the majority,mainly on RSV virus infection.The positive rates of virus,bacteria,MP and CP of children in Uighur nationality are high than those in Han nationality.

一份珍贵的学术遗产:1950年代民族问题大讨论再审视

1950年代关于民族问题的大讨论,开启了中国史学界以马克思主义理论为指导研究民族问题的热潮。当时学习的重点是斯大林关于形成民族的四个要素。斯大林强调依照这四个要素衡量,在资本主义出现之前,不可能出现民族,民族只能是资本主义时代的产物。范文澜注意到斯大林论断的适用性问题,著文指出中、欧历史情况不同。欧洲历史进入资本主义时代才有了民族国家,而古代中国早在秦汉时期就已经有了“持久的相当巩固的整体”的王朝国家,“汉民族有它自己的发展过程,并不因为有了资本主义才开始形成民族”。围绕汉民族形成时间问题所展开的大讨论实际上是在马克思主义理论指导下成规模地研讨中华民族形成问题的嚆矢。这场大讨论的丰富成果是一份珍贵的学术遗产。

Associations between thromboxane A synthase 1 gene polymorphisms and the risk of ischemic stroke in a Chinese Han population

Thromboxane A synthase 1 （TBXAS1） catalyses the synthesis of thromboxane A2 （TXA2）, which plays an important role in the pathogenesis of ischemic stroke. Thus, the TBXAS1 gene was investigated as a candidate gene involved in the formation of atherosclerosis. This case-control study collected peripheral blood specimens and clinical data of 370 ischemic stroke patients and 340 healthy controls in the Northern Chinese Han population from October 2010 to May 2011. Two TBXAS1 single-nucleotide polymorphisms, rs2267682 and rs10487667, were analyzed using a SNaPshot Multiplex sequencing assay to explore the relationships between the single-nucleotide polymorphisms in TBXAS1 and ischemic stroke. The TT genotype frequency and T allele frequency of rs2267682 in the patients with ischemic stroke were significantly higher than those in the controls （P 〈 0.01 and P = 0.02）. Furthermore, compared with the GG ＋ GT genotype, the TT rs2267682 genotype was associated with increased risk of ischemic stroke （odds ratio （OR） = 1.80, 95% confidence interval （CI）： 1.16–2.79, P 〈 0.01）. Multivariate logistic analysis with adjustments for confounding factors revealed that rs2267682 was still associated with ischemic stroke （OR = 1.94,95% CI ： 1.13–3.33, P = 0.02）. The frequency of the T-G haplotype in the patients was significantly higher than that in the controls according haplotype analysis （OR = 1.49, 95% CI： 1.10–2.00, P 〈 0.01）. These data reveal that the rs2267682 TBXAS1 polymorphism is associated with ischemic stroke. The TT genotype of TBXAS1 and T allele of rs2267682 increase susceptibility to ischemic stroke in this Northern Chinese Han population. The protocol has been registered with the Chinese Clinical Trial Registry （registration number： ChiCTR-COC-17013559）.

Difference in normal corneal thickness and curvature between Mongolian and Han nationalities

AIM: To investigate the differences in central corneal thickness(CCT) and curvature in myopic patients with different genders between Mongolian and Han nationalities in the Inner Mongolia region.METHODS: Patients with myopia, among whom 122cases(244 eyes) were Mongolian and 150 cases(300eyes) were Han, were selected. Pentacam was used to measure the corneal curvature, whereas CCT was determined by Pentacam, Orbscan and ultrasound pachymetry.RESULTS: Comparisons of the curvature of men and women in Mongolia showed a significant difference(P 【0.05) by comparing of the CCT values measured by three methods in Han and Mongolian in Inner Mongolia, we can draw a conclusion that the CCT values measured by Pentacam are less than the values by Orbscan and ultrasound pachymetry, and there are statistically significant difference in CCT measurement among the instruments except between the Orbscan and ultrasound pachymetry. The CCT values of Mongolians are more than Han people, and the analysis exhibited statistical significance. The CCT values measured by Orbscan in Mongolia of women are more than men, the difference showed statistical significance.CONCLUSION: Corneal curvature in Mongolian females was significantly higher than that in males. However, no significant difference was observed among Han males and females. The CCT values of Mongolian females were higher than those of males. The normal CCT values measured by Pentacam in Mongolian myopic patients were smaller than those obtained by Orbscan or ultrasound. The normal CCT values of Mongolian patients with myopia were higher than those reported for domestic people.

Difference in DRB1~* gene polymorphisms between Han and Uyghur ulcerative colitis patients in China

AIM:To evaluate the association between HLA-DRB1 alleles and Han and Uyghur ulcerative colitis (UC) patients residing in the Xinjiang Uyghur Autonomous Region of China. METHODS:In this study, 102 UC patients (53 Han including 22 men and 31 women, and 49 Uyghur patients including 25 men and 24 women; aged 48.07 ± 15.83 years) and 310 age- and sex-matched healthy controls were enrolled in the Department of Gastroenterology, Xinjiang People's Hospital of China from January 2010 to May 2011. UC was diagnosed based on the clinical, endoscopic and histological findings following Lennard-Jones criteria. Blood samples were collected and genomic DNA was extracted by routine laboratory methods, and both polymerase chain reaction and gene sequencing were used to identify HLA-DRB1 allele variants. The potential association between genetic varia-tion and UC in Han and Uyghur patients was examined. There were no statistical differences in HLA-DRB1 allele frequencies in Han UC patients. RESULTS:There was no significant difference in the sex ratio between the controls and UC patients (P = 0.740). In Han patients with UC (n = 53), HLA-DRB1 *03 , *13 allele frequencies were lower than in healthy controls (n = 161), but not statistically significant, and HLA-DRB1*04*11*14 allele frequencies were higher than in healthy controls, but without statistical significance. Differences between Uyghur UC patients and the control group were observed for HLA-DRB1*04 and HLA-DRB1*13 , both showed a greater frequency in UC patients (10.21% vs 2.69%, P = 0.043; 14.29% vs 4.03%, P = 0.019). HLA-DRB1*14 also showed a greater frequency in UC patients (14.29% vs 2.69%, P = 0.006). The frequencies of DRB1*04 , *13*14 alleles were increased in Uyghur UC patients compared with normal controls. The frequency of DRB1 * 08 was decreased in Uyghur UC patients compared with normal controls. HLA-DRB1 alleles showed no association with UC in Han patients. There were no statistical differences in HLA-DRB1 allele frequencies in Han UC patients. The frequencies of DRB1*04 , *13*14 alleles were increased in Uyghur UC patients compared with normal controls. The frequency of DRB1*08 was decreased in Uyghur UC patients compared with normal controls. Polymorphism of the HLA-DRB1 gene may contribute to the clinical heterogeneity of UC between Han and Uyghur UC patients in China. CONCLUSION:HLA-DRB1*04*13*14 and DRB1*08 may contribute to the clinical heterogeneity of UC between Han and Uyghur UC patients.

The association analysis polymorphism of CDKAL1 and diabetic retinopathy in Chinese Han population

AIM： To identify the contribution of CDKAL1 to the development of diabetic retinopathy（DR） in Chinese population.·METHODS： A case-control study was performed to investigate the genetic association between DR and polymorphic variants of CDKAL1 in Chinese Han population with type 2 diabetes mellitus（T2DM）. A welldefined population with T2 DM, consisting of 475 controls and 105 DR patients, was recruited. All subjects were genotyped for the genetic variant（rs10946398） of CDKAL1. Genotyping was performed by i PLEX technology. The association between rs10946398 and T2 DM was assessed by univariate and multivariate logistic regression（MLR） analysis.· RESULTS： There were significant differences in C allele frequencies of rs10946398（CDKAL1） between control and DR groups（45.06% versus 55.00%, P 〈0.05）.The rs10946398 of CDKAL1 was found to be associated with the increased risk of DR among patients with diabetes.·CONCLUSION： Our findings suggest that rs10946398 of CDKAL1 is independently associated with DR in a Chinese Han population.

A single nucleotide polymorphism in the IL1RL1 gene is associated with Behcet's disease in a Chinese Han population

AIM:To explore the association of single nucleotide polymorphisms(SNPs)in the IL33/IL1RL1 gene region with the susceptibility to Behcet’s disease(BD)in a Chinese Han population.METHODS:A total of eight SNPs in the candidate gene region(rs11792633,rs7025417,rs10975519 and rs1048274 in IL33;rs2310220,rs12712142,rs13424006 and rs3821204 in IL1RL1)were genotyped in783 BD patients and 701 healthy controls by the Sequenom Mass Array i PLEX platform.RESULTS:A statistically significant association was observed between IL1RL1 rs12712142 and BD patients.The frequency of IL1RL1 rs12712142 variant allele A was significantly lower in BD patients than that in controls(OR=0.8,95%CI:0.69-0.94,Pc=0.039);the genotype distribution(Pc=0.043)and additive and dominant genetic model analyses(OR=0.8,95%CI:0.69-0.94,Pc=0.040 and OR=0.72,95%CI:0.58-0.88,Pc=0.011)also indicated a strong association between rs12712142 and BD patients.CONCLUSION:This is the first study to reveal the association between IL1RL1 rs12712142 variant allele A and the decreased risk of BD in the Chinese Han population,indicating a protective role of IL1RL1 in the pathogenesis of BD.

Geotechnical Investigation of Slopes along the National Highway (NH-1D) from Kargil to Leh, Jammu and Kashmir (India)

The national highways are always considered as the economic backbone of the country and have often assisted development work all along their routes. The National Highway (NH-1D) is the most strategic and the only all weather surface link between the two districts of Ladakh region (Kargil and Leh). The area under investigation experiences high vehicular traffic, particularly between March and August, as in the remaining months the Kargil and Leh districts?remain cutoff?from each other due to bad weather. In recent years, frequent occurrences of slope failures along the highway primarily affect the smooth functioning of the traffic movement which severely affects the life of the people of the area. Strategically, this road network is very important and plays a significant role in transportation and other activities. In order to ensure the stability of road network in the area, it becomes extremely important to understand the triggering mechanism of these failures. The present study made an attempt in this direction and the Slope Mass Rating (SMR) method has been used for slope stability analysis at different locations. The stability of the slopes was also assessed using kinematic analysis conjointly with SMR to identify the types of failure and its potential failure directions associated with each slope. The result obtained after calculating RMR from the selected facets ranges from 11 to 89 with lower values indicating presence of potentially unstable areas. Results have shown that in a total of 20 facets, 65.28% belong to wedge failure, 22.26%?belong to toppling failure and 12.45% belong to plane failure.

Blimp-1 protein and Hans classification on prognosis of diffuse large B-cell lymphoma and their interrelation

Background and Objective:Diffuse large B-cell lymphoma (DLBCL), the most common type of non-Hodgkin's lymphoma (NHL), is heterogeneous on molecular and clinical levels, therefore, its prognosis is difficult to predict.This study aimed to evaluate the value of Blimp-1 protein and Hans classification in predicting the prognosis of DLBCL and their interrelation.Methods:The clinical records of 136 patients with DLBCL were reviewed.The patients were followed up for 5-80 months (median, 39 months).Immunohistochemical staining for CD10, MUM1, Bcl-6, and Blimp-1 were performed on paraffin-embedded tumor tissues from the 136 patients.The correlations of Blimp-1 protein and Hans classification in prognosis of DLBCL and their interrelation were analyzed.Results:Blimp-1 was detected in 38 (30.0%) patients, and was associated with a significantly shorter overall survival (OS) (P=0.030).Using the Hans classification based upon the expression of CD10, Bcl-6, and MUM1, 54 patients had germinal center B-cell (GCB) phenotype and 82 had non-GCB phenotype.The 5-year OS rate was 75% in the GCB group and 52% in the non-GCB group (P=0.020).The positive rate of Blimp-1 was 22.2% in the GCB group and 31.7% in the non-GCB group (P=0.329).The Cox regression multivariate analysis showed that international prognosis index (IPI) and Hans classification had independent prognostic significance, whereas Blimp-1 was not an independent prognostic factor.Conclusions:The patients with GCB subtype of DLBCL had better prognosis than the non-GCB subtype.High level of Blimp-1 expression in the patients with DLBCL implies a shorter survival, but it is not associated with Hans classification.

Correlation Analysis of 5-<i>HTTLPR</i>Polymorphism and Post-Traumatic Stress Disorder in Li and Han Nationalities of Hainan Province

Objective: To analyse the correlation of 5-HTTLPR gene polymorphism and PTSD in Li and Han nationalities of Hainan Province. Methods: Essen trauma inventory (ETI), clinician administered post-traumatic stress disorders scale, (CAPS), tower of Hanoi (TOH), wsiconsin card sorting test (WCST), trail making test (TMT) and wechsler adult intelligence scale revised China (WAIS-RC) were used to investigate patients with PTSD and healthy volunteers (control group). PCR and PPGE were used to detect the polymorphism of 5-HTTLPR gene and analyze its correlation with PTSD. Results: The ETI score, total PTSD score and TMT time of Li nationality patients with PTSD were significantly higher than those of Han nationality patients with PTSD, and the IQ of comprehension and operation in WAIS-RC was significantly lower than that of Han nationality patients with PTSD (P < 0.05). The ETI score, total PTSD score and TMT time of 5-HTTLPR genotype in Li nationality and Han nationality patients with PTSD were significantly higher than those of LL genotype, and the perception, calculation and block diagram in WAIS-RC were significantly lower than those of LL genotype patients (P Conclusions: The SS genotype can increase the risk of PTSD in Li nationality and Han nationality people in Hainan. LL genotype is associated with PTSD of Li and Han nationalities in Hainan, and is an important protective factor for PTSD of Li and Han nationalities in Hainan.

Lack of association between cellular repressor of E1A-stimulated genes(GREG)polymorphisms and coronary artery disease in the Han population of North China

Objectives Phenotypic switching of smooth muscle cells(SMCs) plays a critical role in the pathogenesis of atherosclerotic lesions such as coronary artery disease (CAD).Accumulating evidence demonstrates(hat a cellular repressor of E1A-stimulated genes(CREG) plays a role in the maintenance of the mature phenotype of vascular SMCs. The purpose of the present study was to assess the possible association between CREG and CAD in the Han population of North China.Methods The promoter region of CREG by direct sequencing was conducted in 48 subjects.Then SNP rs2995073 and another 4 tagSNPs(rs4657669,rs3767443, rsl6859185,rs3753921) were selected for the association study.All five selected SNPs were determined in 1161 patients with angiographically proven CAD and 960 controls with normal coronary angiograms to investigate the possible involvement of CREG in CAD.Results Genotype frequencies of the five examined polymorphisms were similarly distributed between CAD group and controls(P】0.05).Further haplotype analysis also found no significant differences in the distributions between CAD group and controls(P】0.05). Conclusions This study did not show an association between common variants of CREG and CAD in the northern Chinese Han population.

From Xia People to Han People and to Chinese Nation——A Study of the Trajectory of the Cohesion and Integration of Chinese Ethnic Groups

Building multiethnic China was primarily driven by the cohesion and integration of main ethnic groups within Chinese territory, but the process was recorded according to traditional ethnic group discourse system of ancient China, so there is some doubt whether “nation state” theory can interpret it precisely. This paper manages to figure out the trajectory of cohesion and integration of main ethnic groups propelled by ancient Chinese people from the Xia Dynasty to the late Qing Dynasty by focusing on traditional views on ethnic groups of ancient China. This paper contend that although there were the phenomena of naming the products of the integrations after the regimes they belonged to,“Han people,”“Hua people” and even “Zhonghua(Chinese) people,” became the designations of main cohesive ethnic groups in China over time, and the concept of “Chen Min(subjects)” and the appearance of “nationals” that developed during the Qing Dynasty successfully transformed their identity, which Liang Qichao referred to as “Chinese nation”. Efforts by the rulers of the Qing Dynasty to bridge the gaps between different ethnic groups by developing a community of “subjects”(Chenmin), produced the concept of “Chinese nation” which included the various ethnic groups with the “Han people” as the main group. This new community merely represents the present-day cohesion of the Chinese Nation and the internal integration continues.

Correlation between plasma VEGFA expression level of chronic obstructive pulmonary disease in Li and Han nationalities in Hainan

Objective:To analyze the relationship between plasma vascular endothelial growth factor and patients with chronic obstructive pulmonary disease in Hainan Li and Han nationality, and the correlation between VEGFA and COPD after different stratification, to explore the significance of VEGFA in the diagnosis and treatment of Li people with chronic obstructive pulmonary disease.Methods:249 patients with COPD were recruited in Hainan (109 cases of Li and 140 cases of Han), and 246 cases in the control group (89 cases of Li;157 cases of Han ) From July 2014 to March 2015, We measured plasma vascular endothelial growth factor protein levels ,and determined the expression difference of plasma VEGFA in patients with chronic obstructive pulmonary disease and healthy controls according to different races, genders, smoking status, etc., and analyzed the correlation between the expression of VEGFA in patients with chronic obstructive pulmonary disease in Li and Han in Hainan.Conclusion:(1) In the Li population, the expression of VEGFA of COPD patients and healthy controls was lower than that of Han (P<0.05);(2) The causes of elevated VEGFA levels in the plasma of the Li population are: high BMI, advanced age, use of wood, hay,recent respiratory infections and AECOPD;(3) The causes of elevated VEGFA levels in plasma in Han population are: COPD, low education level, smoking age, repeated respiratory infection, family history of respiratory diseases, frequent coughing, recent respiratory infection and acute COPD Aggravation period;(4) In the AECOPD, the expression of VEGFA in plasma was higher than that in stable phase and control group;the expression of plasma VEGFA in stable phase of COPD was lower than that in the control group.

Correlation between plasma VEGFA expression level of chronic obstructive pulmonary disease in Li and Han nationalities in Hainan

Objective:To analyze the relationship between plasma vascular endothelial growth factor and patients with chronic obstructive pulmonary disease in Hainan Li and Han nationality, and the correlation between VEGFA and COPD after different stratification, to explore the significance of VEGFA in the diagnosis and treatment of Li people with chronic obstructive pulmonary disease.Methods: 249 patients with COPD were recruited in Hainan (109 cases of Li and 140 cases of Han), and 246 cases in the control group (89 cases of Li;157 cases of Han ) From July 2014 to March 2015, We measured plasma vascular endothelial growth factor protein levels ,and determined the expression difference of plasma VEGFA in patients with chronic obstructive pulmonary disease and healthy controls according to different races, genders, smoking status, etc.,and analyzed the correlation between the expression of VEGFA in patients with chronic obstructive pulmonary disease in Li and Han in Hainan.Conclusion:(1) In the Li population, the expression of VEGFA of COPD patients and healthy controls was lower than that of Han (P<0.05);(2) The causes of elevated VEGFA levels in the plasma of the Li population are: high BMI, advanced age, use of wood, hay,recent respiratory infections and AECOPD;(3) The causes of elevated VEGFA levels in plasma in Han population are: COPD, low education level, smoking age, repeated respiratory infection, family history of respiratory diseases, frequent coughing, recent respiratory infection and acute COPD Aggravation period;(4) In the AECOPD, the expression of VEGFA in plasma was higher than that in stable phase and control group;the expression of plasma VEGFA in stable phase of COPD was lower than that in the control group.

Major Data of China's 1% National Population Sampling Survey,1995

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