Diabetes onset at an earlier age and high HbA1c levels as risk factors of diabetic retinopathy

AIM:To assess the effect of age at diabetes onset and uncontrollable high Hb A1 c levels on the development of diabetic retinopathy(DR)among Chinese type 2 diabetes mellitus(DM)patients.METHODS:This was a cross-sectional survey of diabetic patients in Subei district,China.Data covering physical measurements,fasting blood-glucose(FBG),glycosylated hemoglobin(Hb A1 c),blood lipid,urinary albumin/creatinine ratio(UACR),ocular fundus examination,and diabetes treatment records were collected.An independent sample t-test were used to analyze differences.A Logistic regression analysis was applied to study the independent risk factors of DR.RESULTS:A total of 1282 patients with type 2 DM were enrolled,and 191 cases had DR(14.9%).The age at diabetes onset,education level,alcohol consumption,Hb A1 c level,UACR level,and hypoglycemic drugs were independent influencing factors for DR.The older the onset of diabetes,the less likely to develop DR(OR:0.958,95%CI:0.942-0.975,P=0.000).Patients were then divided in terms of age at diabetes onset as follows:<50 y,50-59 y,60-69 y,and≥70 y.Compared with diabetes onset age<50 y,50-59 y(OR:0.463,95%CI:0.306-0.699,P=0.000),60-69 y(OR:0.329,95%CI:0.203-0.535,P=0.000)and≥70 y(OR:0.232,95%CI:0.094-0.577,P=0.002)were at a lower risk of DR.The prevalence of DR was highest in patients with diabetes onset age<50 y(29.5%,P<0.05).The Hb A1 c level(8.67±1.97)%and proportion of insulin injection(52.5%)in patients with diabetes onset<40 y were higher than in patients with older diabetes onset age(P<0.05).CONCLUSION:Diabetes onset at an earlier age and uncontrollable high Hb A1 c level could be independent risk factors for DR.     

Hospital based epidemiological study for diabetic retinopathy:study design and preliminary results

AIM:To describe the design and preliminary results of the hospital based epidemiological study for diabetic retinopathy(HBESDR),an ongoing epidemiological study to estimate the prevalence of diabetic retinopathy(DR) and to elucidate the clinical,anthropometric,biochemical and any other risk factors associated with diabetic retinopathy.METHODS:Totally 2000 diabetes will be recruited from the Diabetes eye clinic in the First Affiliated Hospital of China Medical University.All subjects underwent blood sugar estimation and Oral Glucose Tolerance Test to diagnose diabetes.All diabetes would undergo complete questionnaire,a comprehensive eye examination.Blood and urine would be collected for biochemical investigations.All fundus photographs for any DR will be graded.Participants who need treatment will be sent to the ophthalmic clinic and follow-up interval program for all subjects will be suggested.A computerized database is created for the records.RESULTS:To date,1174 diabetes have been recruited,there were 350(29.81%) DR in all diabetes,most of them were with mild non-proliferative diabetic retinopathy(NPDR)(139,39.71%);71(20.29%) moderate NPDR,66(18.86%) severe NPDR,74(21.14%) proliferative diabetic retinopathy(PDR).Females,longer duration of diabetes,family history of diabetes and hypertension had a statistically significant increase in risk of any DR.CONCLUSION:The study is expected to provide an estimate of the overall prevalence of DR and the prevalence with different duration of diabetes and also a better understanding of the risk factors associated with DR.     

A comparative study of risk factors for corneal infection in diabetic and non-diabetic patients

AIM: To compare the clinical characteristics of infectious keratopathy in type 2 diabetes mellitus (T2DM) and non-diabetes mellitus (NDM) and to investigate risk factors for infectious keratopathy in T2DM patients. METHODS: Totally 230 patients with T2DM and 168 with NDM diagnosed as infectious keratopathy were hospitalized at Qingdao Eye Hospital from 2001 to 2015. Data including sex, age, occupation, season, smoking and alcohol consumption habits, duration between onset and treatments, duration of hospitalization were collected. Initially identified indicators were analyzed with a multivariate logistic regression. Glycosylated hemoglobin A1c (HbA1c) in patients with T2DM was analyzed. The infectious keratopathies in the two groups were categorized and compared. RESULTS: The diabetic group consisted of 146 (63.5%) males and 84 (36.5%) females. The NDM group consisted of 111 (66.1%) males and 57 (33.9%) females. There was no signigicantly difference in sex distribution between the two groups (P>0.05). There were significant differences in age, occupation of patients, season of the onset of diseases, duration between onset and treatment, and durations of hospitalization between the two groups (P<0.05). In most of the patients in the diabetic group, the duration between onset and treatment was ≤3mo, and most was ≥3mo in the NDM group. Multivariate logistic regression analysis revealed that age and season were related to the development of corneal infection in the T2DM group (OR=1.709, 1.706). In the T2DM group, HbA1c was 9.09%±2.12%. There were statistically significant differences in the incidences of bacterial keratitis and herpes simplex keratitis in the two groups (P<0.05), but no significant statistical difference was found between fungal keratitis and amoebic keratitis (P>0.05). CONCLUSION: Advanced age and the summer and winter seasons are identified as risk factors for infectious keratopathy in T2DM patients, and T2DM patients are more prone to bacterial keratitis.     

Prevalence of and risk factors for diabetic macular edema in a northeastern Chinese population

AIM:To estimate the prevalence of diabetic macular edema(DME) and clinically significant macular edema(CSME),and to assess their risk factors in a population with type 2 diabetic mellitus(T2DM) located in northeast China.METHODS:Patients were included from the Fushun Diabetic Retinopathy Cohort Study(FS-DIRECT),a community-based study conducted in northeast China.The presence of DME and CSME was determined by the Early Treatment Diabetic Retinopathy Study(ETDRS) retinopathy scale of fundus photographs.The age-standardized prevalence of DME and CSME was estimated.The association between DME/CSME and risk factors was analyzed in a multivariate Logistical analysis.RESULTS:A total of 292(15.4%) and 166(8.8%) patients were diagnosed as DME and CSME,yielding the age and sex standardized prevalence of 13.5%(95%CI:11.9%-15.0%),and 7.1%(95%CI:5.9%-8.3%),respectively.Female patients had a higher prevalence of DME compared to their male counterparts(15.7% vs 10.4%,P=0.03).Multivariable Logistic regression analysis showed that younger age,insulin use,proteinuria,longer duration of diabetes,and higher glycosylated hemoglobin A1c,were associated with the prevalence of DME and CSME.Patients with higher fasting plasma glucose,systolic blood pressure,and blood urea nitrogen were also found to be associated with DME.CONCLUSION:Early fundus screening in diabetic patients is invaluable and given the relatively high prevalence of DME and CSME in this study cohort,those with a high risk of sight threatening maculopathy would invariably benefit from earlier detection.     

糖尿病患者血糖控制相关因素与糖尿病视网膜病变发生的关系

Objective To explore the related risk factors for diabetic retinopathy(DR)in type 2diabetes.Methods The clinical data of 412 type 2 diabetes patients,diagnosed between 2003 and 2010,were analyzed retrospectively.The diagnosis of DR and proliferative diabetic retinopathy(PDR)was confirmed by ophthalmoloseopy and fundus fluorescein angiography.Glycated hemoglobin Alc,glucose,insulin,and C-peptide of fasting plasma,and 1,2 and 3 hours postprandial plasma were measured.According to the above-mentioned data,get the fluctuation of glucose,insulin and C-peptide of 1,2 and 3hour postprandial plasma.Results The morbidity of DR and PDR increased following the longer disease duration.Age,diabetic duration,body mass index(BMI),hypertension grade,HbAlC,fasting plasma insulin and C-peptide,2 and 3 hours postprandial plasma glucose,1 and 2 hours postprandial plasma insulin,1,2 and 3 hour postprandial plasma C-peptide,1,2 and 3 hours postprandial plasma glucose,insulin and C-peptide fluctuation are different statistically among non-DR group,non-PDR group and PDR group(P＜0.05).3 hours postprandial plasma glucose and fasting plasma insulin were risk factors of DR (P＜0.05).Conclusions Postprandial plasma glucose and fasting plasma insulin were risk factors of DR.Nevertheless,postprandial insulin,fasting and postprandial C-peptide,postprandial plasma glucose,insulin and C-peptide fluctuation were useful for DR diagnosis.     

糖尿病患者血糖控制相关因素与糖尿病视网膜病变发生的关系

Objective To explore the related risk factors for diabetic retinopathy(DR)in type 2diabetes.Methods The clinical data of 412 type 2 diabetes patients,diagnosed between 2003 and 2010,were analyzed retrospectively.The diagnosis of DR and proliferative diabetic retinopathy(PDR)was confirmed by ophthalmoloseopy and fundus fluorescein angiography.Glycated hemoglobin Alc,glucose,insulin,and C-peptide of fasting plasma,and 1,2 and 3 hours postprandial plasma were measured.According to the above-mentioned data,get the fluctuation of glucose,insulin and C-peptide of 1,2 and 3hour postprandial plasma.Results The morbidity of DR and PDR increased following the longer disease duration.Age,diabetic duration,body mass index(BMI),hypertension grade,HbAlC,fasting plasma insulin and C-peptide,2 and 3 hours postprandial plasma glucose,1 and 2 hours postprandial plasma insulin,1,2 and 3 hour postprandial plasma C-peptide,1,2 and 3 hours postprandial plasma glucose,insulin and C-peptide fluctuation are different statistically among non-DR group,non-PDR group and PDR group(P＜0.05).3 hours postprandial plasma glucose and fasting plasma insulin were risk factors of DR (P＜0.05).Conclusions Postprandial plasma glucose and fasting plasma insulin were risk factors of DR.Nevertheless,postprandial insulin,fasting and postprandial C-peptide,postprandial plasma glucose,insulin and C-peptide fluctuation were useful for DR diagnosis.     

Proteomic analysis of human serum from diabetic retinopathy

AIM: To establish and compare serum proteomic of diabetic retinopathy(DR) patients in various phases and discuss pathogenesis of DR so as to find out possible serum specific molecular markers for early diagnosis of DR. METHODS: Thirty-two subjects were divided into four groups: one group of eight type 2 diabetes mellitus (T2DM) patients without apparent DR (No-DR, NDR), one group of eight T2DM patients with non-proliferative diabetic retinopathy(NPDR), one group of eight T2DM patients with proliferative diabetic retinopathy(PDR) and one group of eight healthy volunteer participants. Two dimensional fluorescence difference gel electrophoresis (2D-DIGE) was applied to establish differential protein expression profiles in four groups. Matrix-assisted laser desorption/ionization time of flight tandem mass spectrometry (MALDI-TOF-TOF MS) was applied to identify mass spectrometry of differential proteins and analyze follow-up bioinformatics. RESULTS: 2D-DIGE maps of serum protein were satisfactory obtained from NDR, NPDR, PDR and normal control groups. Twenty-six different proteins spots were screened(the volume ratio was ＞1.5 based on DeCyder software analysis). Twenty-four of them were verified and two of them were not. Fifteen proteins were verified. Most of them were high-abundant proteins in serum. The four relatively low-abundant ones were beta 2-glycoprotein I (β2-GPI), alpha2-HS-glycoprotein(AHSG), alpha1-acid glycoprotein(α1-AGP) and apolipoprotein A-1(apo A-1). β2-GPI expression was gradually increased in the development of DR but unrelated to the severity of DR. The volume ratio of β2-GPI is 1.54, 2.43, and 2.84 in NDR, NPDR and PDR group respectively compared with normal control group. CONCLUSION: Serum proteomic analysis of 2D-DIGE combined with MALDI-TOF-TOF MS is feasible to be applied in the study of DR. β2-GPI probably takes part in the process of DR occurrence and development and it could be a candidate biomarker on DR diagnosis in early phase.     

Correlation of neutrophil-to-lymphocyte ratio, platelet-to-lymphocyte ratio and type 2 diabetic retinopathy

AIM: To investigate the relationship between neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR) and type 2 diabetic retinopathy (DR). METHODS: A total of 200 cases with type 2 diabetes mellitus were involved. All patients were divided into three groups according to the fundus examination: diabetes mellitus (DM, n=100), non-proliferative diabetic retinopathy (NPDR, n=62) and proliferative diabetic retinopathy (PDR, n=38). 100 healthy persons were selected as the normal control group (NCG, n=100). The related indicators, such as neutrophil count, lymphocyte count and platelet count, were measured. RESULTS: The value of NLR was significantly higher in PDR group patients than in NC group (1.81), DM group (1.76) and NPDR group (1.85) (P<0.05). The value of PLR was significantly higher in PDR group patients (126.18) than in DM group (111.64) (P<0.05). Logistic regression analysis showed that age (β= -0.047) was protective factor, course of diabetes (β=0.071) and systolic blood pressure (β=0.024) were risk factors for diabetic retinopathy (P<0.05), but the value of NLR and PLR was not statistically significant in the Logistic regression analysis. CONCLUSION: The value of NLR and PLR increased in the PDR group, but it is not independent risk factor for diabetic retinopathy.     

Association of candidate gene polymorphisms with diabetic retinopathy in Chinese patients with type 2 diabetes

AIM: To investigate the association between a set of six candidate genes and the risk of diabetic retinopathy (DR) in an urban community cohort of Chinese patients with type 2 diabetes mellitus (T2DM). METHODS: A population-based cross-sectional study. The diabetic subjects were recruited from an urban community in Beijing and categorized into groups of proliferative diabetic retinopathy (PDR), non-proliferative diabetic retinopathy (NPDR), or diabetic without any retinopathy (DWR) based on the fundus photography and duration of diabetes. Six candidate genes, including advanced glycation end product specific receptor (AGER), aldose reductase (AKR1B1), inducible nitric oxide synthase (iNOS), pigment epithelium derived factor (PEDF), tumor necrosis factor-alpha (TNF-α), and paraoxonase 1 (PON1), were chosen based on Meta-analysis of genetic association studies for DR and biochemical pathways implicated in DR progression. The allele and genotype distribution of 21 functional single-nucleotide polymorphisms (SNPs) in those 6 candidate genes were investigated using MassARRAY genotyping system. RESULTS: Among 1461 diabetic patients recruited from community, 569 were selected in following genotyping analysis, including 97 patients with PDR, 217 with NPDR, and 255 with DWR. For the promoter variant rs1051993 in AGER gene, the distribution of allele and genotype in PDR group differed from that in DWR group (allele: P=0.011; genotype: P=0.01). Compared with DWR, patients with PDR had lower frequencies of heterozygous genotype GT (9.8% for DWR, 1% for PDR, OR: 0.10, 95%CI: 0.01-0.72) and minor allele T (4.9% for DWR, 0.5% for PDR, OR: 0.10, 95%CI: 0.01-0.75). In multivariate model, the distribution of genotype for rs1051993 in PDR group was significantly different from that in DWR group (GT vs GG: OR: 0.07, 95%CI: 0.01-0.61, P<0.001). No association with DR was observed in other genotyped SNPs. CONCLUSION: The data suggest a significant association of the promoter variant rs1051993 in AGER gene with PDR in Chinese cohort with T2DM.     

糖尿病患者565例视网膜病变初步调查及早期诊断

目的:初步调查门诊2型糖尿病(diabetes mellitus,DM)患者糖尿病视网膜病变(diabetic retinopathy,DR)的发生情况,并探讨早期诊断的方法。方法:对我院眼科门诊及住院治疗的2型DM患者,经WHO有关IDDM诊断标准确诊,共565例1130眼,通过询问获得病史以及相关检查和诊断资料,常规进行视力、眼压,以及散瞳检眼镜检查眼底,并采用眼底视网膜彩色照相检查,对镜下可疑及有明确视网膜病变的患者行荧光素血管造影(fundus fluorescein angiography,FFA)检查。结果:DM患者565例1130眼中检眼镜下有视网膜病变417例825眼,9例为单侧患者,发生率73.80%。病程5a以上患者中,存在1期以上DR占78.0%。417例明确DR患者除造影禁忌证外,372例进行了荧光素眼底血管造影检查,其中1,2,3,4期患者造影确定病情程度与眼底镜下符合率90.6%(337例),9.4%(35例)严重于检眼镜下确定病情程度。检眼镜下无眼底改变0期糖尿病患者148例296眼,病程<5a患者61例,行造影检查38例,确诊DR为1期者12例,占检查人数32%;病程高于5a患者87例,26例行造影检查发现微血管瘤存在,占30%。565例患者中血糖不稳定和控制不好者共327例,占57.9%。结论:门诊2型DM患者DR并发症的高发生率需要密切关注。为避免患者视力丧失,常规检眼镜检查,尤其是数码眼底彩色照相图像分析对早期诊断有重要价值,需引起内科医师重视。     

The prevalence of blindness and low vision in older onset diabetes mellitus and associated factors: a community-based study

PURPOSE: This community-based study was conducted to assess the prevalence and related factors of low vision and legal blindness in older onset diabetic patients (diagnosed at age 30 and older). METHODS: All known diabetic patients who live in the four primary health care center region Abidinpa?a Ankara, Turkey (total population: 96,348) were included in this cross-sectional study. The prevalence of known diabetes mellitus is 2.2%, of which 96.6% are older onset and 3.4% are younger onset. RESULTS: In the older onset diabetes group (1289 cases), 10.8% of the population had low vision and only 2.7% had legal blindness. Diabetic retinopathy (DR) was observed in 23.6% of the patients with low vision (42% proliferative DR) and in 62.9% of the patients with legal blindness (90.1 % proliferative DR). CONCLUSIONS: In older onset diabetic patients with low vision, nonproliferative retinopathy was a more frequent cause of impaired vision than proliferative retinopathy. Low vision and legal blindness caused by retinopathy were significantly associated with sex, age at examination, age at diagnosis, duration of diabetes, type of diabetes treatment, and hypertension in univariate analysis. However, in logistic regression analysis, low vision and legal blindness caused by retinopathy were found to be associated with longer duration of diabetes (> or =15 years), use of insulin, and hypertension.     

Prevalence and Associated Factors of Diabetic Retinopathy among Type 2 Diabetes Mellitus Patients in Brunei Darussalam: A Cross-sectional Study

PurposeTo determine the prevalence of diabetic retinopathy (DR) and the factors associated with retinopathy among type 2 diabetes mellitus (DM) patients in Brunei Darussalam.MethodsCross-sectional study of all type 2 DM patients who attended diabetic eye screening over a 3-month period at one of four government hospitals. We assessed association between DR with the following variables: age, sex, glycated hemoglobin (HbA1c), duration of DM, hypertension, hyperlipidemia, and microalbuminuria.ResultsThere were 341 patients (female, 58.9%; mean age, 55.3 ± 11.9 years) with a mean duration of DM of 9.4 ± 7.4 years and mean serum HbA1c of 8.4% ± 1.9%. The overall prevalence of any DR was 22.6% (95% confidence interval, 18.8–27.1) with prevalence rates of 4.1% (95% confidence interval, 2.1–6.4) for proliferative DR and 9.7% (95% confidence interval, 6.8–13.2) for vision-threatening DR. Multivariate analysis showed that DR was significantly associated with certain age groups (reduced in older age groups), longer duration of DM (11 years or more), poor control (HbA1c >9.0%) and presence of any microalbuminuria.ConclusionsDR affects one in five patients with DM in Brunei Darussalam, comparable to rates reported for other Asian populations. It is especially worrying that one in ten patients with DM had vision-threatening DR. DR was significantly associated with longer duration of DM, poor control and presence of microalbuminuria but reduced in older age groups. It is important to advocate good control right from the time of diagnosis of DM and institute timely and effective management of retinopathy. DR was significantly associated with longer duration of DM, poor control of diabetes, and presence of microalbuminuria but reduced in older age groups.     

eGFR作为糖尿病视网膜病变预警因子的研究

目的　评价糖尿病患者中糖尿病视网膜病变（ｄｉａｂｅｔｉｃｒｅｔｉｎｏｐａｔｈｙ,ＤＲ）的患病率及其与肾小球滤过率（ｇｌｏｍｅｒｕｌａｒｆｉｌ-ｔｒａｔｉｏｎｒａｔｅ,ＧＦＲ）的相互关系,探讨ｅＧＦＲ（ｅｓｔｉｍａｔｅｄＧＦＲ）作为ＤＲ预警因子的可行性。方法　１６１３例２型糖尿病（ｔｙｐｅ２ｄｉａｂｅ-ｔｅｓｍｅｌｌｉｔｕｓ,Ｔ２ＤＭ）患者参与本研究。所有研究对象均自愿接受生物化学和眼部检查。ＤＲ由眼科医师通过眼底镜检查和眼底照相确诊。通过易尔统计分析软件评估ＤＲ与ｅＧＦＲ之间的关系。结果　１６１３例糖尿病患者中,ＤＲ患病率为３４．１０％（５５０例）。将有无ＤＲ的患者分组比较,ＤＲ组与ＮＤＲ组差异有统计学意义的变量有:年龄、ＤＭ病程、ＤＭ家族史、空腹及餐后２ｈ血糖、糖化血红蛋白、总胆固醇、收缩压、ｅＧＦＲ、血清肌酐及高、低密度脂蛋白胆固醇。Ｌｏｇｉｓｔｉｃ回归分析结果显示,年龄、ＤＭ病程、血浆糖化血红蛋白、收缩压、舒张压、ｅＧＦＲ以及高密度脂蛋白胆固醇为ＤＲ的独立危险因素,其中ｅＧＦＲ与ＤＲ呈负相关。经调整后的饱和效应分析结果表明当ｅＧＦＲ＜９９．４ｍＬ?ｍｉｎ－１时,糖尿病患者患ＤＲ的风险明显增加。结论　ｅＧＦＲ与ＤＲ负相关,ｅＧＦＲ为９９．４ｍＬ?ｍｉｎ－１是预测ＤＲ发生的关键点。检测和评价这一因素对于ＤＲ的早期发现具有极其重要的临床意义。     

Prevalence and risk factors of diabetic retinopathy in children and young adults

BACKGROUND: Diabetic retinopathy (DR) is a severe complication of diabetic microangiopathy. The prevalence is low in children and increases with patient age and duration of diabetes. PATIENTS AND METHODS: Full ophthalmologic examination was completed by fluorescein angiography in 36 diabetic patients diagnosed in childhood, with duration of diabetes more than 5 years. RESULTS: After 5 years of diabetes, 44% of the patients had DR. Background retinopathy was found in 31%, preproliferative retinopathy in 5% and proliferative retinopathy in 8% of cases. DR was associated with diabetic maculopathy in 8 patients and cataract in 4 patients. DR was correlated with the age of patients at diagnosis of diabetes, time of ophthalmologic examination, sex, duration and balance of diabetes. CONCLUSION: The frequency of DR increases with the duration and the imbalance of diabetes. The importance of well balanced diabetes and regular ophthalmologic examination were necessary to decrease the frequency of DR.     

上海市北新泾街道糖尿病患者视网膜病变的患病率调查

目的 探讨上海市北新泾街道患有糖尿病（DM）居民中糖尿病视网膜病变（DR）患病率和相关因素。 方法 根据居民健康档案获得患DM的居民，通过询问和检查获得病史资料、视力、眼部病变、眼压资料，采用眼底照相方法确立DR诊断。 结果 实际受检535人，受检率为90.68%。共确诊DR患者146例，DR的患病率为27.29%。单纯型和增生型DR的患病率分别为22.99%和4.30%。DM病程为影响DR患病的独立因素。DM病程，同时罹患周围神经病变和体重指数是依次影响DR病情发展到增生型的独立因素。 结论 在DM居民中DR患病率高；需密切监测高危DM居民以控制DR患病。 (中华眼底病杂志, 2006, 22: 31-34)     

Diabetic retinopathy, visual impairment and ocular status among patients with diabetes mellitus in Yemen: A hospital-based study

Background:

We present a series of patients with diabetes mellitus (DM) who attended an eye hospital in Sana, Yemen during 2004.

Aim:

To determine the magnitude and risk factors of diabetic retinopathy (DR).

Design:

Cross-sectional study.

Materials and Methods:

Ophthalmologists assessed vision, ocular pressure, ocular media and posterior segment to note ocular manifestations among patients with DM. DR was graded by using bio-microscope and Volk lens. The prevalence and 95% confidence interval of ocular complications of DM were calculated. Risk factors of DR like age, sex, duration of diabetes and hypertension were evaluated.

Statistical Analysis:

Univariate and multivariate analysis.

Results:

Our series comprised 350 patients suffering from DM. The duration of diabetes was ≥15 years in 101 (29%) patients. Physician was treating 108 DM patients with insulin. The prevalence of DR was 55% (95% CI 49.6–60.1). The proportions of background diabetic retinopathy (BDR), preproliferative diabetic retinopathy (PPDR), proliferative diabetic retinopathy (PDR) and diabetic macular edema were 20%, 13%, 17% and 22% respectively. The prevalence of blindness among DM patients was 16%. The prevalence of cataract and glaucoma was 34.3% and 8.6%. Duration of DM was the predictor of DR. One-fifth of the patients had sight-threatening DR and needed laser treatment.

Conclusions:

DR was of public health magnitude among our patients. An organized approach is recommended to address DR in the study area.     

2型糖尿病患者糖尿病视网膜病变相关危险因素分析

目的：探讨2型糖尿病( type 2 diabetic mellitus,T2DM)患者糖尿病视网膜病变(diabetic retinopathy,DR)相关危险因素。

方法：回顾性分析2013-01/2017-04收治入院的1 013例T2DM患者病例资料,将DR患者纳入观察组,非DR患者纳入对照组。分析T2DM患者DR相关危险因素。

结果：经调查统计DR发生率为27.74%(281/1 013)。经单因素分析,两组患者性别、年龄、T2DM病程、血压、糖化血红蛋白、高密度脂蛋白胆固醇、肌酐以及24h尿蛋白比较,差异有统计学意义(P<0.05)。经多因素Logistic回归分析,男性、年龄>60岁、T2DM病程>10a以及血压、糖化血红蛋白、高密度脂蛋白胆固醇以及肌酐和24h尿蛋白表达异常均是T2DM患者并发DR的危险因素(P<0.05)。

结论：T2DM患者并发DR风险较高,男性、年龄>60岁、T2DM病程>10a以及血压、糖化血红蛋白、高密度脂蛋白胆固醇以及肌酐和24h尿蛋白的高水平表达均可能是诱发DR的危险因素。     

Relationship of duration and onset of diabetes to prevalence of diabetic retinopathy

In a population study of all registered insulin-treated diabetic patients on the Swedish island of Gotland, the prevalence of diabetic retinopathy was determined with ophthalmoscopy, biomicroscopy, and color photography. Retinopathy was present in 173 of 368 patients (47%) and reached a prevalence of 100% after 30 years of diabetes. Proliferative retinopathy was found in 48 subjects (13%) and was more common in females (17%) than in males (9.4%) (P = .01). By simple logistic regression test, the prevalence of total and proliferative retinopathy was correlated with both duration and age at onset of diabetes (P less than .001). However, on multiple regression analysis only the relationship with duration was statistically significant (P less than .001); age at onset was not (P greater than .2). Age had an additional influence only on background retinopathy with hard exudates, which were more frequent in older subjects (P less than .01). Thus, age at onset of diabetes was not correlated with the prevalence of total or proliferative retinopathy.     

The Beijing Desheng Diabetic Eye Study: rationale, design, methodology and baseline data

AIM: To present the rationale, design, methodology, and the baseline data of the Beijing Desheng Diabetic Eye Study (BDDES), and to determine the prevalence of diabetic retinopathy (DR) and possible risk factors in patients with type 2 diabetes mellitus (T2DM) in an urban community of Beijing, China. METHODS: Community-based prospective cohort study of persons diagnosed with T2DM aged 30y or older. The main variables of interest are the presence and progression of DR as determined by the standardized ETDRS grading of seven fields fundus photographs. The presence and severity of DR were analyzed for possible correlations to non-genetic and genetic dispositions. RESULTS: A total of 1438 participants with data available for analysis, the prevalence of any DR was 35.4%. The prevalence of mild non-proliferative diabetic retinopathy (NPDR), moderate NPDR, severe NPDR, and proliferative diabetic retinopathy was 27.7%, 2.6%, 0.5% and 4.5%, respectively. By multiple logistic regression analysis, risk factors for the presence of any DR included male (P=0.031), lower income level (P=0.011), lower education background (P=0.022), longer duration of diabetes (P=0.001), younger age at diabetic onset (P=0.001), higher systolic blood pressure (P=0.007), higher glycosylated hemoglobin A1c levels (P=0.001), high albuminuria (P=0.03), and use of insulin (P<0.001). For vision-threatening DR, four factors were significant: younger age at diabetic onset (P<0.001), higher systolic blood pressure (P=0.042), high albuminuria (P<0.001), and use of insulin (P<0.001). CONCLUSION: The BDDES is the first large-scale ongoing cohort study of a Chinese urban population of persons with type 2 diabetes. Using standardized grading system comparable to large cohort studies from western populations, our baseline data shows that the prevalence of DR and major risk factors in this Chinese ethnic population are comparable to that found in the western population studies.