检验医学 ›› 2021, Vol. 36 ›› Issue (8): 823-827.DOI: 10.3969/j.issn.1673-8640.2021.08.009

• 临床应用研究∙论著 • 上一篇    下一篇

血液透析患者血清镁与身体组成成分及生存率的相关性

钱香蓓1, 吴智明2   

  1. 1.文昌市人民医院检验科,海南 文昌 571300
    2.海南医学院第二附属医院检验科,海南 海口 570216
  • 收稿日期:2020-12-14 出版日期:2021-08-30 发布日期:2021-08-30
  • 作者简介:钱香蓓,女,1979年生,主管技师,主要从事临床生化检验工作。

Correlation of serum magnesium level with body composition and survival in hemodialysis patients

QIAN Xiangbei1, WU Zhiming2   

  1. 1. Department of Clinical Laboratory,Wenchang People's Hospital,Wenchang 571300,Hainan,China
    2. Department of Clinical Laboratory,the Second Affiliated Hospital of Hainan Medical University,Haikou 570216,Hainan,China
  • Received:2020-12-14 Online:2021-08-30 Published:2021-08-30

摘要:

目的 探讨血液透析患者血清镁水平与身体组成成分(体细胞质量指数、过度水合、过度水合/细胞外水分比值、无脂组织指数和脂肪组织指数)及3年累积生存率的关系。方法 选取210例持续性血液透析患者,收集所有患者临床初次检查(基线)的资料,同时检测血清镁、β2-微球蛋白(β2-MG)、血红蛋白(Hb)、白蛋白(Alb)、C反应蛋白(CRP)、血清钙、甲状旁腺激素、磷酸盐和身体组成成分。根据血清镁水平将所有患者分为3组(低水平血镁组、中水平血镁组、高水平血镁组)。采用Logistic回归分析评估血液透析患者低镁血症(血镁<0.73 mmol/L)的危险因素。采用Kaplan-Meier分析比较患者3年全因累积生存率。采用Cox回归分析确定血液透析患者3年全因死亡的危险因素。结果 与中水平血镁组和高水平血镁组相比,低水平血镁组患者年龄较大(P<0.05),透析时间较短(P<0.05),血清CRP水平、过度水合/细胞外水分比值升高(P<0.05),血清Alb水平、体细胞质量指数降低(P<0.05),过度水合升高(P<0.05)。其他项目3个组之间差异均无统计学意义(P>0.05)。Logistic回归分析结果显示,透析时间和水合过度/细胞外水分比值是血液透析患者低镁血症的危险因素[比值比(OR)值分别为1.04、1.02,95%可信区间(CI)分别为1.01~1.08、1.00~1.04]。当充分校正年龄、性别、体质量指数(BMI)、糖尿病史和血压后,血液透析患者死亡风险升高的危险因素为低镁血症和Alb[风险比(HR)值分别为1.71、1.79,95%CI分别为1.04~2.52、1.71~1.98]。结论 低镁血症与透析时间和水合过度/细胞外水分比值显著相关,是血液透析患者3年全因死亡的独立危险因素。

关键词: 镁, 身体组成成分, 血液透析, 生存率

Abstract:

Objective To investigate the relationship between serum magnesium level and body composition (somatic cell mass index,over-hydration,over-hydration/extracellular water ratio,non-adipose tissue index and adipose tissue index)and 3-year cumulative survival rate in hemodialysis patients. The baseline(initial examination) clinical data of patients were collected,and serum magnesium,beta2-microglobulin(β2-MG),hemoglobin(Hb),albumin(Alb),C-reactive protein(CRP),serum calcium,parathyroid hormone,phosphate and body composition were determined. All the patients were classified into 3 groups according to serum magnesium levels(low-level magnesium group,middle-level magnesium group and high-level magnesium group). Logistic regression analysis was used to evaluate the risk factors of hypomagnesemia(serum magnesium <0.73 mmol/L) in hemodialysis patients. Kaplan-Meier analysis was used to compare the 3-year cumulative all-cause survival. Cox regression analysis was used to determine the risk factors of 3-year all-cause mortality in hemodialysis patients. Results Compared with the middle-level magnesium group and the high-level magnesium group,the low-level magnesium group was elder(P<0.05),the dialysis time was shorter(P<0.05),the serum CRP level and over-hydration/extracellular water ratio were higher(P<0.05),serum Alb level and somatic cell mass index were lower(P<0.05),and the over-hydration was higher(P<0.05). There was no statistical significance in the other items among the 3 groups(P>0.05). Logistic regression analysis showed that dialysis time and over-hydration/extracellular water ratio were risk factors for hypomagnesemia in hemodialysis patients [odds ratios(OR) were 1.04 and 1.02,95% confidence intervals(CI) were 1.01-1.08 and 1.00-1.04,respectively]. When adjusted for age,sex,body mass index(BMI),the history of diabetes mellitus and blood pressure,hypomagnesemia [hazard ratio(HR)=1.71,95%CI 1.04-2.52] and Alb(HR=1.79,95%CI 1.71-1.98) were risk factors for increased mortality in hemodialysis patients. Conclusions Hypomagnesemia is correlated with dialysis time and over-hydration/extracellular water ratio,which is an independent risk factor for 3-year cumulative survival of hemodialysis patients.

Key words: Magnesium, Body composition, Hemodialysis, Survival rate

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