上海地区成人维生素D水平与性别、年龄、季节的关系

目的 了解上海地区成人维生素D水平状况,探讨不同性别、年龄、季节对维生素D水平的影响.方法 将21864例在上海市第六人民医院体检中心进行健康体检者作为研究对象进行回顾性研究,包括男性10566人,女性11298人.结果 21864例研究对象的25(OH)D水平为19.68(15.12,25.48)ng/mL.其中维生...     

3 326例南京地区人群维生素D水平与季节关系调查

目的通过测定江苏省中医院2017年就诊患者体内25羟维生素D[25(OH)D]水平,分析目前维生素D水平状况并评价其与季节的关系。方法收集2017年1月1日至2017年12月31日在江苏省中医院测25(OH)D水平的门诊及住院患者3 326例,主要来源于内分泌科、生殖医学科、体检中心等就诊的南京市居民,排除相关影响因素,分别比较不同季节、性别的25(OH)D水平和维生素D营养状况差异。结果 3 326例患者的25(OH)D的平均水平为18.38 ng/mL,维生素D缺乏率为63.3%,不足率为29.0%,正常率为7.7%;春夏两季维生素D水平高于秋冬两季(P0.05);女性维生素D水平明显低于男性(P0.05)。结论南京地区人群存在不同程度的维生素D缺乏,且具有季节差异性,秋冬季节25(OH)D的水平更低,与性别也相关联。维生素D作为人体内不可缺少的维生素对骨骼系统具有重要作用,提高公众合理补充维生素D的意识并针对高危人群及时补充钙剂是必要的,定期检测25(OH)D作为评估体内维生素D水平的常规实验室检查,为临床正确应用维生素D提供科学的理论依据。     

中老年人维生素D、骨密度水平与髋部脆性骨折的相关性研究

目的 探讨中老年人维生素D（VitD）、骨密度（bone mineral density, BMD）水平与髋部脆性骨折的相关性。方法 选取2019年1月至2020年8月在岳阳市人民医院接受治疗的50岁以上患者830例,骨折患者135例（骨折组）,非骨折患者695例（非骨折组）。采集所有研究对象的血清,用电化学发光法测定血清25(OH)D水平,应用双能X线吸收仪测定其腰椎及髋部BMD,并在测定骨密度的同时测量患者身高、体重,计算体质量指数（body mass index, BMI）,观察骨折组与非骨折组之间的VitD与BMD差异。结果 ①所有研究对象中25(OH)D严重缺乏者占16.1 %、缺乏者占34.7 %、轻度缺乏者占29.8 %、充足者占19.4 %,男性VitD水平高于女性(P<0.001)。而不同年龄和BMI的VitD水平无统计学差异（P=0.878、0.346）;②所有研究对象的腰椎、股骨颈BMD (T值)平均为–2.64±1.56及–1.43±1.24,不同性别、年龄、体质量指数研究对象的腰椎及股骨颈BMD水平差异有统计学意义(P<0.001);③髋部骨折组平均VitD为(20.26±10.76) ng/mL,非骨折组为(21.18±10.65) ng/mL,两组间无显著差异(P=0.304);④髋部骨折组腰椎、股骨颈T值低于非骨折组(P<0.001)。对骨折影响因素行单因素分析表明VitD、腰椎T值和股骨颈T值、年龄、体质量指数是髋部脆性骨折的危险因素(P＜0.05)。多因素分析表明年龄、体质量指数、股骨颈T值是髋部骨折的独立危险因素（P＜0.05）,而VitD与腰椎T值对骨折的影响呈现一定的风险增大趋势,但无统计学意义。结论 岳阳地区50岁以上人群存在较低的BMD及VitD水平。年龄、体重、体质量指数、股骨颈BMD是中老年人髋部骨折的独立危险因素,VitD不是髋部骨折的独立危险因素。     

骨质疏松症患者血清25-羟维生素D水平的研究

目的：调查了解西安地区骨质疏松症患者体内维生素D 水平的状况。方法随机选取2012年12月－2013年11月我科440例骨质疏松症患者,采集其清晨空腹静脉血,用Cobase 6000型电化学发光仪（瑞士罗氏诊断）检测血中25（OH）D的水平,按照2012年12月－2013年5月为冬春季和2013年6月－2013年11月为夏秋季进行分组,用SPSS13．0软件进行数据分析。结果共调查了440例骨质疏松症患者,其中女性患者数量远大于男性患者,这些患者普遍存在着维生素D水平不足现象,其中维生素D严重缺乏和缺乏所占比例较大,男女两组在年龄和血清25（ OH） D水平上均无统计学差异,而且冬春季患者体内维生素D的水平要低于夏秋季的患者。结论本研究显示西安地区骨质疏松症患者维生素D不足现象比较普遍,男性女性之间无明显差别,而且体内维生素D水平与季节的变化有关,为骨质疏松症的防治提供一定的数据参考。     

孕妇血清25羟基维生素D水平与妊娠合并症的关系

维生素D是一种脂溶性类固醇激素,通过其循环活性形式25羟基维生素D(25OHD)在人体中发挥作用。维生素D可调节机体钙磷平衡,维持骨骼健康,对人体免疫调节、葡萄糖代谢、细胞增殖等生理过程均有重要作用。孕期女性血清25OHD的缺乏主要由于日照不足和摄入过少导致。25OHD的水平与妊娠合并症(如妊娠高血压、子痫前期和妊娠糖尿病)密切相关,25OHD的缺乏与妊娠高血压和子痫前期呈显著正相关,与妊娠糖尿病则呈负相关。本文就25OHD与妊娠合并症的关系进行综述。     

广州市区40岁以上人群夏季维生素D水平现状分析

目的调查广州市区40岁以上人群夏季体内维生素D(VitD)的水平。方法随机选取2018年5月至10月广东药科大学附属第一医院门诊及住院590例年龄≥40岁人群,所有研究对象均清晨空腹取静脉血,采用Cobase 6000型电化学发光仪(瑞士,罗氏诊断)检测血清25-羟维生素D[25(OH)D]水平,日立-7180型自动生化分析仪测定血钙(Ca)水平。结果590例年龄≥40岁人群中男性患者238例,25(OH)D平均水平为(57.09±24.06) nmol/L,女性患者352例,25(OH)D平均水平(53.71±22.63) nmol/L。其中男性VitD正常占24.79%,不足占34.45%,缺乏占33.19%,严重缺乏占7.56%;女性VitD正常占15.63%,不足占37.22%,缺乏占40.63%,严重缺乏占6.53%。广州市区40岁以上人群夏季以VitD缺乏和不足较常见,且男女两组总体25(OH)D水平差异无统计学意义,仅在80岁以上人群中,男性25(OH)D水平显著高于女性(P=0.026、0.043)。结论本研究显示广州市区40岁以上人群夏季中25(OH)D不足和缺乏现象较普遍,且无性别差异,而在80岁以上人群中,女性25(OH)D水平显著低于男性。维生素D的摄人有必要应引起重视。     

黑龙江省某医院抽样人群血清25羟维生素D水平回顾性研究

目的回顾性分析黑龙江省某医院2017年10月至2018年10月住院患者的维生素D[25(OH)D]水平,并探讨其影响因素。方法收集该医院病案系统2017-2018年所有测定25(OH)D的病例,获取病例信息,将25(OH)D水平按照不同信息分类并比较。结果研究样本包括876名研究对象,25(OH)D缺乏组与不足组共799人,占总人数的91.21%,25(OH)D充足组77人,占8.79%。男性组25(OH)D水平高于女性组,差异具有统计学意义(P<0.001)。男性组中年龄与25(OH)D水平的相关性差异无统计学意义(P=0.772),女性组呈弱正相关(P<0.05)。骨质疏松组(OP)与非骨质疏松组(NOP)间25(OH)D水平差异无统计学意义(P=0.714),女性骨质疏松治疗组25(OH)D水平高于非骨质疏松组(P=0.024)。结论本研究中样本总体25(OH)D水平偏低,提示该地区人群25(OH)D水平普遍偏低。25(OH)D水平与性别、生活方式有关,与年龄、是否患有骨质疏松无关,服用活性维生素D不能提升血清25(OH)D水平。黑龙江地区人群应当注意补充25(OH)D,可以通过改善生活方式或口服维生素D的方式补充。     

岳阳地区50岁以上人群25经维生素D水平及其与骨密度的关系

目的 通过测定269名岳阳地区50岁以上人群血清25经维生素D(25(OH)D)和骨密度(BMD)水平,分析岳阳地区50岁以上人群的维生素D ( VitD)状况,并探讨其与BMD的关系。方法 采集受试者的血清后,用电化学发光法测定血清25(OH)D水平,并同时应用双能X线吸收仪测定腰椎及髓部BMD。结果 所有受试者中,VitD严重缺乏者占24. 2 %,缺乏者占45. 0%,不足者占24. 5 %,充足者占6. 3。男、女性受试者的25(OH)D水平、腰椎及髓部的BMD间有统计学差异(P<0.001),男性高于女性。男性各年龄段间25(OH)D水平及各部位BMD无统计学差异(P=0. 101 ,P = 0. 261 ,0. 055 ,0. 170 ,0. 108 ,0. 051 ) ;女性各年龄段之间25(OH)D水平及腰椎BMD无统计学差异(P = 0. 364 , 0. 063 ) ;髓部BMD有统计学差异(P < 0. 001 ),随着年龄的增长而逐步减低。男性受试者中,不同25(OH)D水平组间股骨颈、转子间区及整髓BMD无统计学差异(P = 0. 076 , 0. 425 , 0. 122 );腰椎、大转子区BMD水平间有统计学差异(P=0. 027 , 0. 017 ) , VitD充足组腰椎BMD高于其他各组(P = 0. 005 , 0. 025 , 0. 009 );不足组、严重缺乏组大转子区BMD高于缺乏组(P = 0. 021, 0. 005 )。女性受试者中,不同25(OH)D水平组各部位BMD均无统计学差异(P = 0. 616 , 0. 739 , 0. 559 ; 0. 608 , 0. 641)。结论 在湖南岳阳地区50岁以上人群存在严重的维生素D缺乏及不足;对于维生素D状况与骨密度之间可能无直接关联,需加大样本量进一步观察。     

季节对维生素D水平的影响

目的了解健康年轻(22～37岁)男性和女性人群维生素D状况以及季节对维生素D水平的影响。方法选取在冬春季或夏秋季进行体检的健康年轻男性和女性,共416例,用酶联免疫的方法测定血中25-羟维生素D(25(OH)D)水平。结果所有的受检对象不论季节和性别25(OH)D水平均明显低于正常值,其中维生素D缺乏和不足(75 nmol/L)的比率近90%,其中冬春季节多数为轻中度缺乏(达80%),而夏秋季节以轻度缺乏或不足为主(70%以上)。25(OH)D水平在冬春季节明显低于夏秋季节。此外,不论任何季节,女性组维生素D中重度缺乏的比率明显高于男性组,25(OH)D水平明显低于男性组。结论我国北方地区居住的人群不论季节和性别维生素D缺乏的发病率均很高,特别是年轻女性是维生素D缺乏的高危人群。应采用有效的措施防治维生素D的缺乏,减少维生素D缺乏对健康的影响。     

慢性肾脏病患者25-羟维生素D3水平的改变及其影响因素分析

目的检测慢性肾脏病(chronickidneydisease,CKD)患者不同进展阶段25-羟维生素D3[25(OH)D3]的浓度,25(OH)D3水平与CKD发生、发展的关系,进一步探讨活性维生素D在CKD患者中的合理应用。方法收集2014年11月至2015年11月中国医科大学附属第一医院肾脏内科住院的非血液净化的CKD患者885例及急性肾损伤患者11例,分别测定25(OH)D3及血红蛋白(hemoglobin,Hb)、血肌酐(SCr)、尿素氮(BUN)、血清胱抑素C(Cystatin C,Cys-C)、血钙、血磷、血碳酸氢根(HCO)3)、血尿酸(uric acid,UA)、血总胆固醇(total cholesterol,TC)、三酰甘油(triglyceride,TG)、低密度脂蛋白胆固醇(low density lipoprotein cholesterol,LDL-C)、高密度脂蛋白胆固醇(high density lipoprotein cholesterol,HDL-C)、血白蛋白(albumin,Alb)、血清碱性磷酸酶(alkaline phosphates,ALP)、C反应蛋白(C-reactive protein,CRP)、糖化血红蛋白(-HbAlC)及采用化学发光法测量血清全段甲状旁腺素(immunoreactive parathyroid hormone,讧TH)。统计CKD不同阶段25(OH)D3不足及缺乏的发生率,分析不同维生素D水平分组下各项生化指标的变化趋势并进行相关性分析。结果①随肾脏病的进展,维生素D严重缺乏的发生率呈升高趋势。急性肾损伤患者25(OH)D3水平为(15.8±9.16)ng/ml,明显高于CKD各期(P0.05)。随25(OH)D3水平下降,患者的血压(收缩压、舒张压)水平升高,尿蛋白的程度加重,血白蛋白水平下降,钙磷代谢紊乱(血钙下降,血磷升高)及血脂代谢异常加重,不同维生素D水平分组间差异有统计学意义(P0.05),而年龄、左室射血分数、肾功能相关指标、骨代谢指标、血尿酸、血红蛋白、C反应蛋白则无统计学差异(P0.05);②25(OH)D3水平与尿蛋白程度相关,中度尿蛋白组和大量尿蛋白组25(OH)D3浓度均明显低于正常尿蛋白组和低尿蛋白组(P0.05);且随着蛋白尿病情加重,维生素D严重缺乏的发生率升高,在各尿蛋白组间差异有统计学意义(χ~2=251.75,P=0.000)。③25(OH)D3水平与血白蛋白、血钙、血红蛋白水平呈正相关;与收缩压、舒张压、尿蛋白定量、磷、血脂水平呈负相关。血白蛋白、收缩压、尿蛋白定量、血红蛋白是25(OH)D3水平的独立危险因素。结论我国东北地区CKD患者维生素D缺乏更加严重。25(OH)D3水平与CKD临床重要指标相关。血白蛋白、收缩压、24 h尿蛋白定量、血红蛋白是25(OH)D3水平的独立危险因素。     

云南省某医院骨科门诊患者血清维生素D水平检测与分析

目的 检测骨科门诊患者血清总25-羟基维生素D[25(OH)D]水平,分析不同性别和年龄段患者血清维生素D营养状态.方法 纳入2018年12月至2020年12月就诊于昆明市第一人民医院骨科门诊并采用化学发光法(免疫法)检查血清25(OH)D水平的2500例患者,记录患者的性别、年龄、血清25(OH)D值,以血清25(O...     

Relationship between vitamin D status, parathyroid hormone levels and bone mineral density in patients with chronic kidney disease stages 3 and 4

AIM: Low vitamin D status is associated with secondary hyperparathyroidism and increased bone turnover in the general population and can aggravate the hyperparathyroidism of chronic kidney disease (CKD) patients. It is also correlated to low bone mineral density (BMD), but this correlation is less clear in CKD patients. Aims of our study were to investigate these associations in CKD stages 3 and 4 patients, and to identify significant predictors of BMD in this population. METHODS: Serum 25-hydroxyvitamin D (25OHD) levels, BMD at the femur and radius, and bone mineral metabolism parameters were measured in 89 CKD stages 3 and 4 patients. Vitamin D status was defined according to the NKF/KDOQI guidelines. RESULTS: Mean 25OHD levels were 53.8+/-32.1 nmol/L and correlated to the severity of proteinuria. Thirty-five patients (39%) had vitamin D insufficiency, 29 (33%) had vitamin D deficiency and five (6%) had severe deficiency. Of the 89 patients, two had osteoporosis and 31 had osteopenia either at femur or radius. Independent predictors for the total femur BMD were the intact parathyroid hormone (iPTH) levels and the body mass index (BMI). For the total radius BMD, independent predictor was only the BMI. Serum 25OHD levels were not directly associated with BMD, but they were independent predictors of iPTH. CONCLUSION: Vitamin D insufficiency and deficiency are very common in CKD stages 3 and 4 population and may indirectly affect, via effects on iPTH, the BMD of these patients.     

The relationship between vitamin D deficiency and diabetic foot ulcer: A meta-analysis

A meta-analysis investigation to measure the relationship between vitamin D deficiency (VDD) and diabetic foot ulcer (DFU). A comprehensive literature inspection till February 2023 was applied and 1765 interrelated investigations were reviewed. The 15 chosen investigations enclosed 2648 individuals with diabetes mellitus in the chosen investigations' starting point, 1413 of them were with DFUs, and 1235 were without DFUs. Odds ratio (OR) in addition to 95% confidence intervals (CIs) were used to compute the value of the relationship between VDD and DFU by the dichotomous and continuous approaches and a fixed or random model. Individuals with DFUs had significantly lower vitamin D levels (VDL) (MD, −7.14; 95% CI, −8.83 to −5.44, P < 0.001) compared to those without DFU individuals. Individuals with DFUs had a significantly higher number of VDD individuals (OR, 2.27; 95% CI, 1.63-3.16, P < 0.001) compared to those without DFU individuals. Individuals with DFU had significantly lower VDL and a significantly higher number of VDD individuals compared to those without DFU individuals. However, caused of the small sample sizes of several chosen investigations for this meta-analysis, care must be exercised when dealing with its values.     

Serum 25-hydroxyvitamin D levels and testosterone deficiency in middle-aged Korean men: a cross-sectional study

Previous studies have demonstrated that male hypogonadism is associated with a low level of vitamin D. However, no reports have investigated the effects of vitamin D on testosterone levels in Korean men. Our aim was to investigate whether testosterone levels are associated with serum vitamin D levels and whether seasonal variation exists. This cross-sectional study analyzed serum 25-hydroxyvitamin D [25(OH)D], total testosterone (TT), and free testosterone (FT) in 652 Korean men over 40 years of age who had undergone a comprehensive medical examination. The average age of the subjects was 56.7 ± 7.9 years, and the mean serum 25(OH)D, TT and FT levels were 21.23 ± 7.9 ng ml⁻¹, 4.70 ± 1.6 ng ml⁻¹, and 8.12 ± 3.3 pg ml⁻¹, respectively. In the multiple linear regression model, 25(OH)D showed positive association with TT (β =0.137, P < 0.001) and FT (β =0.103, P = 0.008). 25(OH)D and FT showed similar seasonal or monthly variation after adjustment for age. A vitamin D deficiency [25(OH)D < 20 ng ml⁻¹] was associated with an increased risk of deficiencies of TT (<2.30 ng ml⁻¹) (odds ratio [OR]: 2.65; 95% confidence interval [CI]: 1.21–5.78, P = 0.014) and FT (<6.50 pg ml⁻¹) (OR: 1.44; 95% CI: 1.01–2.06 P = 0.048) after adjusting for age, season, body mass index, body composition, chronic disease, smoking, and alcohol use. In conclusion, we demonstrated a positive correlation between 25(OH)D and testosterone, which showed similar seasonal variation in Korean men.     

Relationship between vitamin D status, body composition and physical exercise of adolescent girls in Beijing

Summary  Little is known about the prevalence of actual vitamin D deficiency in healthy school-aged adolescents, particularly in China. The aim of this study was to examine the prevalence of hypovitaminosis D and to identify whether there was any association between vitamin D status, body composition and physical exercise in 323 Chinese adolescent girls in Beijing, China (40°N). Introduction  It is well recognized that persistent severe vitamin D deficiency is associated with the bone abnormalities of rickets and osteomalacia. However, there is now evidence suggesting that low vitamin D status, not previously considered to be a state of deficiency is associated with secondary hyperparathyroidism, increased bone remodelling and other clinical signs thought only to be found in severe vitamin D deficiency. Hypovitaminosis D in healthy children and adolescents has been reported frequently in many countries, especially in winter. Methods  We performed a cross-sectional analysis of 323 Chinese adolescent girls in Beijing in winter. Mean age of the subjects was 15.0 (±0.4) years. About 32.8%, 68.4% and 89.2% of the subjects were at risk of vitamin D deficiency when defined as plasma concentrations of 25(OH)D of 25, 37.5 or 50 nmol/L, respectively. Results  This cross-sectional analysis of 323 Chinese adolescent girls in Beijing in winter showed that hypovitaminosis D was common in these subjects. In addition, body mass index, milk intake, participation in organized sports and total physical activity were all significant independent determinants of vitamin D status. An inverse association was found between plasma 25(OH)D and intact-parathyroid hormone (iPTH) concentration. Body mass index (BMI), milk intake, participation in organized sports and total physical activity all emerged as major independent determinants of vitamin D status as assessed by plasma 25(OH)D concentration. Vitamin D status was positively associated with lean body mass (LBM), but there was no association with the degree of body adiposity. Regardless of the concentration of 25(OH)D in blood used to define vitamin D deficiency, hypovitaminosis D was common in these subjects. Conclusion  It is recommended that policies be developed to prevent vitamin D deficiency in adolescent girls. Further studies are needed to identify the mechanisms whereby vitamin D status is related to exercise and to body composition during growth.     

A role for vitamin D and the vitamin D receptor in keloid disorder

Keloids are disfiguring fibroproliferative lesions that can occur in susceptible individuals following any skin injury. They are extremely challenging to treat, with relatively low response rates to current therapies and high rates of recurrence after treatment. Although several distinct genetic loci have been associated with keloid formation in different populations, there has been no single causative gene yet identified and the molecular mechanisms guiding keloid development are incompletely understood. Further, although it is well known that keloids are more commonly observed in populations with dark skin pigmentation, the basis for increased keloid risk in skin of colour is not yet known. Because individuals with dark skin pigmentation are at higher risk for vitamin D deficiency, the role of vitamin D in keloid pathology has gained interest in the keloid research community. A limited number of studies have found lower serum vitamin D levels in patients with keloids, and reduced expression of the vitamin D receptor (VDR) in keloid lesions compared with uninjured skin. Vitamin D has documented anti-inflammatory, anti-proliferative and pro-differentiation activities, suggesting it may have a therapeutic role in suppression of keloid fibrosis. Here we review the evidence supporting a role for vitamin D and VDR in keloid pathology.