高同型半胱氨酸血症与皮质下缺血性血管病患者认知功能障碍的关系

目的探讨高同型半胱氨酸血症(Hhcy)及叶酸、维生素B12缺乏与皮质下缺血性血管病(SIVD)不同程度认知功能障碍的相关性。方法将119例SIVD患者按照简易精神状态量表(MMSE)认知功能程度的不同分为痴呆组与非痴呆组。其中痴呆组54例,非痴呆组65例。对所有受试者检测其同型半胱氨酸(Hcy)及血清叶酸、维生素B12水平。结果痴呆组血浆Hcy水平为(43±9)μmol/L,显著高于非痴呆组的(20±6)μmol/L(P<0.01);血清叶酸和维生素B12水平分别为(8±4)nmol/L、(290±154)pmol/L,显著低于非痴呆组的(13±3)nmol/L、(504±141)pmol/L(均P<0.01)。采用Spearm an相关方法分析,显示不同性别的Hcy水平与MMSE分数均呈负相关(男:r=-0.685,女:r=-0.689,二者均P<0.01),与年龄均呈正相关(男:r=-0.592,女:r=0.576,二者均P<0.01);Hcy水平与糖尿病、血脂、高血压、吸烟、饮酒等其他危险因素无明显相关性(P>0.05)。结论伴随血浆Hcy水平增高SIVD认知功能障碍程度加重,Hhcy可能是SIVD认知功能障碍的独立危险因素,叶酸、维生素B12缺乏是间接引起Hhcy,而导致SIVD重要的营养因素。     

脑小血管病的轻度认知损害与同型半胱氨酸的相关性研究

目的探讨脑小血管病（SVD）患者的血浆同型半胱氨酸（Hcy）与血管性轻度认知功能损害（VMCI）的关系。方法选取SVD患者151例,按照蒙特利尔认知评估量表（MoCA）的评分结果分为VMCI组（80例）和非VM-CI组（71例）。所有研究对象均测定血浆Hcy及叶酸、VitB12水平。结果 VMCI组Hcy水平高于非VMCI组,叶酸、VitB12水平低于非VMCI组（P〈0.01）。SVD患者Hcy水平与年龄呈正相关（r=0.176,P〈0.05）,与MoCA评分的总分及视空间与执行功能、注意与计算力、语言、延迟回忆各亚项的评分呈明显负相关（P均〈0.01）。结论高Hcy可能是SVD患者VMCI的独立危险因素,叶酸、VitB12缺乏是间接引起Hcy增高而导致VMCI的重要营养因素。     

老年血管性痴呆病人的血浆同型半胱氨酸水平与认知功能、抑郁状况的关系

目的探讨老年血管性痴呆(VD)病人的血浆同型半胱氨酸(Hcy)水平与认知功能、抑郁状况的关系。方法选取我院老年VD病人94例(VD组)以及健康体检者86例(对照组),检测病人血压、血Hcy、叶酸和维生素B12(VitB_(12))水平。采用蒙特利尔认知评定量表(MoCA)及简易智力状况检查量表(MMSE)评估研究对象认知功能,采用汉密尔顿抑郁量表(HAMD)评估研究对象抑郁症状。比较2组各项指标的差异并探讨与Hcy的关系。结果与对照组比较,VD组的Hcy水平(P0.001)、HAMD评分(P0.001)、收缩压(SBP)(P=0.008)、舒张压(DBP)(P=0.022)显著升高,而叶酸(P=0.011)、VitB_(12)水平(P=0.039)、MoCA(P0.001)、MMSE(P0.001)评分显著降低。VD病人的Hcy水平与MoCA评分(r=-0.782,P=0.015)、MMSE评分(r=-0.829,P=0.010)呈负相关,与HAMD评分呈正相关(r=0.711,P=0.033)。结论老年VD病人的Hcy升高与其认知损害和抑郁症状存在相关性,临床中应积极纠正VD病人的高Hcy水平状态。     

血管性痴呆患者认知功能与血浆同型半胱氨酸水平的关系

目的探讨血管性痴呆(VaD)患者认知功能与血浆同型半胱氨酸(Hcy)水平的关系。方法选取2013-06~2015-02在该院住院的VaD患者46例、同期收治的非痴呆性脑梗死患者50例以及同龄健康者40名。根据简易精神状态检查量表(MMSE)评分对VaD患者划分严重程度。观察各组血浆中Hcy、叶酸、维生素B_(12)水平及其与VaD严重程度的关系。结果 VaD组及非痴呆性脑梗死组血浆Hcy水平高于健康组(P0.05),VaD组血浆Hcy水平高于非痴呆性脑梗死组(P0.05),VaD组叶酸及维生素B_(12)水平低于非痴呆性脑梗死组和健康组(P0.05),痴呆程度轻、中、重组Hcy浓度逐次升高,叶酸及维生素B_(12)浓度逐次降低(P0.05)。结论血浆Hcy浓度和VaD的发生和发展密切相关,高Hcy血症可能是导致VaD的危险因素之一,检测Hcy水平有助于VaD的防治。     

老年认知障碍与同型半胱氨酸的相关性分析

目的分析老年脑梗死认知障碍与同型半胱氨酸(Hcy)的相关性。方法选取我院80例老年住院脑梗死病人,根据认知障碍程度分为痴呆组(37例),正常认知组(22例)和轻度认知障碍组(MCI组21例)。分别行简易精神状态量表(MMSE)评分,检测Hcy、叶酸、维生素B12。将Hcy分为3个水平:15μmol/L,16μmol/L～30μmol/L,30μmol/L。比较3组患病例数、MMSE及各亚组MMSE评分,分析Hcy与认知水平的相关性。结果痴呆组与正常认知组Hcy、叶酸、维生素B12比较,差异有统计学意义(P 0.05);痴呆组与MCI组Hcy、叶酸比较,差异有统计学意义(P 0.05)。不同Hcy水平亚组MMSE评分记忆力、计算力与注意力、延时回忆、语言能力方面比较,差异有统计学意义(P 0.05)。Hcy与MMSE评分呈负相关(r=-0.715,P 0.05)。痴呆组Hcy与MMSE评分呈负相关(r=-0.912,P 0.05);MCI组Hcy与MMSE评分呈负相关(r=-0.35,P 0.05)。Hcy与叶酸呈负相关(r=-0.501,P 0.05),Hcy与维生素B12呈负相关(r=-0.463,P 0.05)。结论高Hcy与认知障碍相关,叶酸与维生素B12降低是高Hcy水平的原因,高Hcy可能主要通过影响记忆、计算力、语言能力影响认知。     

糖尿病神经性膀胱患者血浆同型半胱氨酸、血清叶酸、维生素B_(12)的水平及尿动力学变化分析

目的 探讨糖尿病神经性膀胱(DNB)患者血清叶酸(FA)、维生素B_(12)(VitB_(12))、血浆同型半胱氨酸(Hcy)及尿动力学指标的变化及其临床意义。方法 选取许昌市中心医院内分泌科收治的T2DM患者251例,其中合并DNB患者86例(DNB组)、单纯T2DM患者165例(T2DM组),比较两组FA、VitB_(12)、Hcy及尿动力学指标。结果 DNB组FPG、2hPG、HbA1c、尿微量白蛋白(UMA)、膀胱最大测压容量(VMBC)、Scr、BUN、Hcy高于T2DM组(P0.01);FIns、FA、VitB_(12)、最大尿流率(MFR)、最大尿流率时逼尿及压力(PQmax)、膀胱顺应性(BC)低于T2DM组(P0.01)。结论 DNB患者血清FA、VitB_(12)、Hcy及尿动力学指标均发生改变。     

血浆同型半胱氨酸、叶酸、维生素B_(12)水平与脑梗死及血管性痴呆的相关性

目的探讨血浆同型半胱氨酸(Hcy)、叶酸及维生素B12水平与脑梗死及血管性痴呆(VD)的相关性。方法采用直接化学发光技术测定32例VD患者,18例非痴呆性脑梗死患者及20例健康对照组血浆Hcy、叶酸及维生素B12水平。结果 VD患者血浆Hcy水平明显高于非痴呆性脑梗死组及正常对照组(P<0.01),其叶酸及维生素B12水平也明显低于非痴呆性脑梗死组及正常对照组(P<0.01)。但不同程度VD患者间Hcy、叶酸及维生素B12水平无显著差异(P>0.05)。结论高Hcy血症是脑梗死及VD的危险因素,但不能影响VD程度。     

叶酸与VitB_6联合治疗对高血压合并高同型半胱氨酸血症患者颈动脉硬化的影响

目的讨论叶酸联合维生素B_6(VitB_6)对高血压合并高同型半胱氨酸(Hcy)血症患者颈动脉硬化的影响。方法选择2012年1月至2017年6月于我院接受治疗的高血压合并高Hcy血症患者80例,随机分成对照组(40例,常规治疗)与观察组(40例,常规治疗+叶酸+VitB_6);比较两组患者治疗前后颈动脉硬化相关指标变化,比较两组患者治疗前后血浆Hcy水平变化。结果治疗后,对照组血浆Hcy水平较治疗前差异不明显(P0.05),观察组患者血浆Hcy水平均降低,且观察组低于对照组,差异有统计学意义(P0.05);对照组颈动脉IMT值较治疗前升高,观察组颈动脉IMT值较治疗前明显降低,差异有统计学意义(P0.05)。结论叶酸联合VitB_6能够显著降低高血压合并高Hcy血症患者血浆Hcy水平,改善颈动脉硬化现象,推广价值高。     

初发脑梗死和短暂性脑缺血发作患者血Hcy、维生素B12和叶酸水平变化及意义

目的观察初发脑梗死(CI)及短暂性脑缺血发作(TIA)患者血浆同型半胱氨酸(Hcy)、血清维生素B12和叶酸水平变化,并探讨其意义。方法选取初发CI患者180例(CI组),TIA患者24例(TIA组),同期健康体检者180例(对照组)。抽取各组空腹静脉血,采用循环酶法检测血浆Hcy,化学发光法检测血清维生素B12和叶酸。结果与对照组比较,CI组与TIA组血浆Hcy均升高,血清维生素B12均降低,P均<0.01;CI组与TIA组比较,P均>0.05。各组血清叶酸比较,P均>0.05。CI组和TIA组血浆Hcy与血清维生素B12均呈负相关(r分别为-0.344、-0.155,P<0.01、0.05),Hcy、维生素B12是CI发生的独立危险因素(OR分别为1.050、1.003,95%CI分别为1.019~1.082、1.001~1.004,P均<0.01)。结论初发CI与TIA患者血浆Hcy均升高、血清维生素B12均降低、叶酸无明显变化,Hcy和维生素B12均为CI发生的独立危险因素。     

急性心肌梗死、急性脑梗死患者血清同型半胱氨酸、叶酸、维生素B12水平研究

目的观察急性心肌梗死、急性脑梗死患者血清同型半胱氨酸(homocysteine,Hcy)、叶酸及维生素B12水平,探讨Hcy水平与叶酸、维生素B12的相关性及Hcy与心脑血管事件相关性的差异。方法随机选取山西医科大学第二医院2010年10月—2011年10月急性心肌梗死患者60例为心梗组,急性脑梗死患者72例为脑梗组,体检中心同期健康体检者60例为对照组。分别测定3组血清Hcy、叶酸、维生素B12水平,并做组间比较、相关性分析和非条件logistic回归。结果心梗组Hcy高于对照组(P<0.05),叶酸、维生素B12低于对照组(P<0.05);脑梗组Hcy高于对照组(P<0.05),叶酸、维生素B12低于对照组(P<0.05);心梗组、脑梗组Hcy、叶酸、维生素B12差异无统计学意义(P>0.05)。血清Hcy水平与叶酸(rs=-0.379)、维生素B12(rs=-0.350)呈负相关(P<0.01)。Hcy水平升高是急性心肌梗死(OR=1.253,95%CI:1.138～1.380)、急性脑梗死(OR=1.317,95%CI:1.182～1.467)的危险因素,Hcy与脑梗死的相关性更强(β脑梗组0.275vs心梗组0.226)。结论急性心肌梗死、急性脑梗死患者血清Hcy水平升高,叶酸、维生素B12水平降低。血清Hcy水平升高与叶酸、维生素B12缺乏有关。高同型半胱氨酸血症是心脑血管事件发生的危险因素,Hcy与脑梗死的相关性更强。     

急性脑梗死患者同型半胱氨酸与叶酸、维生素B_(12)和血脂水平的关系

目的 探讨急性脑梗死患者与正常对照者血浆同型半胱氨酸(homocysteine,Hcy)水平的差别,以及急性脑梗死患者血浆Hcy水平与叶酸、维生素B_(12)和血脂水平以及临床症状之间的关系.方法 纳入年龄、性别、高血压和糖尿病等配比因素无显著性差异的91例首次发病的急性脑梗死患者和100例无脑血管意外的对照者,采用循环酶法测定血浆Hcy水平,化学发光法测定叶酸、维生素B_(12)水平,生化分析仪速立法测量血脂水平,急性脑梗死患者进行美国国立卫生研究院卒中量表(National Institutes of Health Stroke Scale,NIHSS)评价.结果 急性脑梗死组血浆Hcy水平为(21.22±7.29)μmol/L,显著高于对照组的(13.19±2.13)μmol/L(P＜0.05);急性脑梗死组血浆Hcy水平与叶酸(r=-0.307,P＜0.05)和维生素B_(12)(r=-0.27,P＜0.05)水平均呈显著负相关,与低密度脂蛋白呈显著正相关(r=0.282,P＜0.05),与高密度脂蛋白呈显著负相关(r=-0.219,P＜0.05);急性脑梗死组血浆Hcy水平均值随NIHSS评分升高而增高(P＜0.05).结论 高Hcy血症是急性脯梗死的独立危险因素,叶酸和维生素B_(12)水平随着Hey水平的升高而降低;血浆Hcy水平越高,临床症状越严重;Hcy可能通过影响血脂代谢增高缺血性脑血管病的风险.     

Homocysteine concentration in primary and systemic sclerosis associated Raynaud's phenomenon

OBJECTIVE: To investigate whether patients with systemic sclerosis (SSc) have raised homocysteine (Hcy) plasma levels, thought to be an independent risk factor for vascular disease, and to study the relationship between Hcy and endothelial damage, and between Hcy and methylene-tetrahydrofolate reductase (MTHFR) genotypes, and patients' vitamin nutritional status, which are among the more frequent causes of hyperhomocysteinemia. METHODS: We measured Hcy, von Willebrand factor (vWF), folic acid, and vitamin B12 plasma levels and analyzed the frequencies of MTHFR mutations in 30 patients with SSc and 12 patients with primary Raynaud's phenomenon (RP); 29 healthy subjects served as controls. RESULTS: Patients with SSc had higher Hcy and vWF concentrations than those with RP (p < 0.01 and p < 0.02, respectively) or controls (p < 0.02 and p < 0.0001, respectively). Folic acid and vitamin B12 were lower in SSc than in RP (p < 0.01 and p < 0.02, respectively) or controls (p < 0.05). MTHFR genotype did not influence Hcy, folate, or vitamin B12 concentrations, but patients homozygous for the mutant gene had higher vWF levels. CONCLUSION: Patients with SSc, but not those with RP, had significantly higher Hcy and vWF plasma levels. Nutritional rather than inherited factors seem to have a pathogenic role in SSc hyperhomocysteinemia.     

同型半胱氨酸与叶酸、维生素B12及维生素B6的关系

目的　探讨正常人群血同型半胱氨酸 (Hcy)水平分布及Hcy与年龄和性别的关系 ,Hcy水平与叶酸 ,维生素B1 2 及维生素B6之间的关系。方法　应用高效液相色谱 (HPLC)荧光检测法测定6 88例正常人血浆Hcy水平 ,用放射免疫方法测定叶酸及维生素B1 2 水平 ,用 96孔板微生物学法测定血清维生素B6水平。结果　相关分析结果显示 :血浆Hcy水平在正常人中呈非正态分布 ,随年龄增长血浆Hcy水平增加 ,男性比女性高。血浆Hcy水平与维生素B6、维生素B1 2 及叶酸水平呈负相关 (r分别为 - 0 35 4 8,- 0 2 91 6 ,- 0 32 76 ,P值均 <0 0 1 )。高Hcy血症者较非高Hcy血症者其血维生素B6、维生素B1 2 及叶酸水平均明显降低 (P值均 <0 0 1 )。结论　正常人中增高的血浆Hcy浓度与体内的维生素水平低下有关。     

帕金森病患者认知障碍与血浆同型半胱氨酸水平的相关性研究

目的研究帕金森病(PD)患者认知障碍与血浆同型半胱氨酸(Hcy)水平的关系。方法选择PD患者90例.其中认知功能正常43例(认知正常组).伴认知功能障碍47例(认知障碍组)及健康体检者40例(对照组),比较3组血浆Hcy、叶酸、维生素B_(12)水平。结果认知正常组和认知障碍组患者血浆Hcy水平明显高于对照组[(1 5.70±4.38)μmol/L vs(1 6.20±5.53)μmol/L vs(1 3.51±3.59)μmol/L,P<0.05]。结论 Hcy水平可能与PD认知障碍无关。     

血清生化指标对血管性帕金森综合征患者的辅助诊断价值

目的探讨血清生化指标对血管性帕金森综合征(VP)的辅助诊断价值。方法选择我院就诊的VP患者62例(VP组)和帕金森病(PD)患者57例(PD组),另选择同期就诊的健康体检者35例(对照组)。收集3组的一般临床资料及血清生化指标。采用ROC曲线判别各项指标对VP的辅助诊断效能,计算ROC曲线下面积(AUC)。结果 3组年龄、性别、同型半胱氨酸(Hcy)、叶酸、糖化血红蛋白、TC、HDL-C、LDL-C水平比较,差异有统计学意义(P<0.05,P<0.01)。与对照组比较,VP组年龄、男性、Hcy水平明显升高,HDL-C水平明显降低,VP组和PD组叶酸、TC、LDL-C水平明显降低(P<0.05,P<0.01)。Logistic回归分析显示,年龄和Hcy升高是VP危险因素,HDL-C升高是VP保护因素(P<0.05,P<0.01)。Spearman相关性分析显示,VP患者叶酸与糖化血红蛋白、TC、LDL-C水平呈正相关(r=0.997,r=0.992,r=0.993,P<0.01),糖化血红蛋白与TC、LDL-C水平呈正相关(r=0.997,r=0.998,P<0.01)。Hcy与叶酸、糖化血红蛋白、尿酸水平呈负相关(P<0.05)。Hcy判别VP的AUC为0.902(95%CI:0.832~0.982,P=0.000),叶酸+HDL-C+LDL-C+TC的AUC为0.828(95%CI:0.739~0.917,P=0.000)。结论 Hcy、叶酸联合血脂水平可能是VP的潜在辅助诊断指标。     

同型半胱氨酸与脑梗死关系探讨

目的　探讨血清总同型半胱氨酸 (tHcy)水平与脑梗死关系。方法　测定 112例脑梗死患者及 4 2例健康对照者的血清总同型半胱氨酸 (tHcy)、维生素B12 (VitB12 )和叶酸 (FA)水平。结果　 ( 1)脑梗死组的血清tHcy平均水平 ( 17 10± 8 5 3) μmol/L显著高于对照组 ( 11 18± 3 0 2 ) μmol/L ;( 2 )血清tHcy水平与FA与VitB12 水平均呈负相关 ;( 3)高同型半胱氨酸血症 (Hcy >15 0 μmol/L) ,经校正性别、年龄、吸烟、血脂、血压、血糖等危险因素后 ,脑梗死的相对危险度 (OR)为 4 78,[95 %可信区间 (CI)为 1 70～ 13 4 6 ]。结论　 ( 1)血清tHcy水平升高可增加脑梗死的发病危险度 ;( 2 )FA、VitB12 是tHcy的非遗传影响因素。     

Vitamin B12 deficiency and hyperhomocysteinemia as correlates of cardiovascular risk factors in Indian subjects with coronary artery disease

Background and purposeFolate and vitamin B12 are essential components in the metabolism of homocysteine (Hcy). Hyperhomocysteinemia has been implicated in endothelial dysfunction and cardiovascular disease. However, the association of Hcy, vitamin B12, and folic acid with cardiovascular risk factors in patients with coronary artery disease (CAD) has not been studied in Indian patients. This study was conducted with the aim to evaluate the relationship of vitamin B12, folic acid, and Hcy levels with cardiovascular risk factors in subjects with known CAD.Methods and subjectsThree hundred patients (216 men; 84 women; aged 25–92 years) who had CAD on angiography were included in this study consecutively. All patients were evaluated for anthropometry and cardiovascular risk factors, and blood samples were collected for biochemical, nutritional, and inflammatory markers.ResultsPercentage of vitamin B12 and folate deficiency was 86.7% and 2.7%, respectively. Hyperhomocysteinemia was present in 95.3% patients. Vitamin B12 levels were significantly lower and Hcy levels were significantly higher in subjects with dyslipidemia, DM, and/or hypertension. Serum vitamin B12 was inversely associated with triglyceride and very low-density lipoprotein (VLDL) and positively with high-density lipoprotein (HDL). Hcy was positively associated with triglyceride and VLDL and negatively with HDL. Vitamin B12 was inversely correlated with inflammatory markers (high-sensitivity C-reactive protein and interleukin-6) directly related to insulin resistance whereas Hcy showed the opposite pattern.ConclusionsSerum vitamin B12 deficiency and hyperhomocysteinemia are related with cardiovascular risk factors in Indian patients with CAD.     

幽门螺杆菌对冠心病患者血清同型半胱氨酸的影响

目的探讨幽门螺杆菌(Hp)与冠心病的关系及对血清同型半胱氨酸(Hcy)的影响。方法应用酶联免疫吸附实验法测定冠心病组(242例)及非冠心病组(88例)血清Hp抗体(HpIgG),比较两组HpIgG阳性率。应用放射免疫法测定冠心病组Hcy、叶酸(Fol)、维生素(Vit)B12,并对其HpIgG阳性组与HpIgG阴性组进行对比分析。结果冠心病组血清HpIgG阳性率明显高于非冠心病组(53.3%比38.6%,P<0.05);冠心病患者HpIgG阳性组血清Hcy浓度明显高于HpIgG阴性组(P<0.05);而两组Fol、VitB12水平无明显差异。结论Hp感染与冠心病发病有关;Hp可能通过升高Hcy水平、从而促进冠心病发生。     

Evidence that folic acid deficiency is a major determinant of hyperhomocysteinemia in Parkinson′s disease

In the present work we measured blood levels of total homocysteine (_tHcy), vitamin B₁₂ and folic acid in patients with Parkinson′s disease (PD) and in age-matched controls and searched for possible associations between these levels with smoking, alcohol consumption, L-DOPA treatment and disease duration in PD patients. We initially observed that plasma _tHcy levels were increased by around 30 % in patients affected by PD compared to controls. Linear correlation, multiple regression and comparative analyses revealed that the major determinant of the increased plasma concentrations of _tHcy in PD patients was folic acid deficiency, whereas in controls _tHcy levels were mainly determined by plasma vitamin B₁₂ concentrations. We also observed that alcohol consumption, gender and L-DOPA treatment did not significantly alter plasma _tHcy, folic acid and vitamin B₁₂ levels in parkinsonians. Furthermore, disease duration was positively associated with _tHcy levels and smoking was linked with a deficit of folic acid in PD patients. Considering the potential synergistic deleterious effects of Hcy increase and folate deficiency on the central nervous system, we postulate that folic acid should be supplemented to patients affected by PD in order to normalize blood Hcy and folate levels, therefore potentially avoiding these risk factors for neurologic deterioration in this disorder.     

Low vitamin B6 and folic acid levels are associated with retinal vein occlusion independently of homocysteine levels

Retinal vein occlusion (RVO) is one of the most common retinal vascular disorders. During the last years, high levels of homocysteine (Hcy) have been demonstrated to be an independent risk factor for RVO. Aim of this study was to investigate the association among circulating B-group vitamins, Hcy and RVO. Thus, we studied 262 RVO patients and 262 age- and sex-comparable healthy subjects. Serum vitamin B6 was measured by HPLC, serum folic acid and vitamin B12 by radioimmunoassay and plasma Hcy by FPIA.

Blood levels of vitamin B6, folate and Hcy, but not of vitamin B12, were found to be significantly different in patients as compared to healthy subjects. At the univariate analysis, the lowest tertile of vitamin B6 [odds ratio (OR) 4.03; 95% confidence interval (CI) 2.58–6.31; P < 0.0001)] and folate (OR 6.13; 95% CI 3.85–9.76, P < 0.0001), and the highest tertile of Hcy (OR 8.08; 95% CI 5.05–12.92, P < 0.0001) were found to be significantly associated with RVO. Moreover, at multivariate analysis, after adjustment for traditional cardiovascular risk factors, Hcy, and circulating levels of vitamins, respectively, the lowest tertile of vitamin B6 (OR 3.29; 95% CI 1.89–5.70, P < 0.0001) and folate (OR 5.41; 95% CI 3.08–9.51, P < 0.0001) and the highest tertile of Hcy (OR 2.58; 95% CI 1.12–5.94, P < 0.0001) maintained their significant association with RVO. In conclusion, the present study documents, on a large sample of patients, that low vitamin B6 levels, low folic acid levels and elevated Hcy levels are each independently associated with RVO.