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J Intern Med:每月高剂量维生素D能否改善社区居住老年人的骨密度?

2017-12-05 吴星 环球医学

2017年11月,发表在《J Intern Med》的一项由新西兰和美国科学家进行的随机对照试验,考察了社区居住的老年人中,每月高剂量维生素D对骨密度的影响。

2017年11月,发表在《J Intern Med》的一项由新西兰和美国科学家进行的随机对照试验,考察了社区居住的老年人中,每月高剂量维生素D对骨密度的影响。

背景:严重缺乏维生素D导致骨软化,但社区中维生素D补充的试验尚未平均证实其对成人骨矿物质密度(BMD)或骨折风险的受益。

目的:确定每月补充高剂量维生素D是否影响普通人群和25-羟基维生素D水平较低的人群的BMD。

方法:社区居住的老年人试验的2年亚研究。共有452例参与者被随机化至接受每月维生素D3 100000 IU或安慰剂。主要终点为腰椎BMD的变化。预定义探索性分析以确定维生素D对BMD影响的基线25-羟基维生素D阀值。

结果:意向治疗分析显示,腰椎(组间差异0.0071 g cm-2,95% CI:-0.0012,0.0154)或全身没有显着治疗效果,但在2年时间内,两个髋部部位BMD均显着减少~1/2%。基线25-羟基维生素D与治疗效果之间有显着的相互作用(P=0.04)。基线25-羟基维生素D≤30 nmol L-1(n=46)时,脊柱和股骨部位的组间BMD变化~2%,脊柱和股骨颈的BMD变化显着,但对全身BMD无影响。当基线25-羟基维生素D>30 nmol L?1时,差异达~1/2%且仅在全髋显着。

结论:本亚研究显示,社区居住的老年人的非靶向维生素D补充对BMD没有显着临床获益。探索性分析显示,基线25-羟基维生素D≤30 nmol L-1时,可产生有意义获益。这代表,老年成人骨健康基于试验的维生素D缺乏的定义迈出了显着一步。

原始出处

Reid IR, Horne AM, Mihov B,et al. Effect of monthly high-dose vitamin D on bone density in community-dwelling older adults substudy of a randomized controlled trial. J Intern Med. 2017 Nov;282(5):452-460. doi: 10.1111/joim.12651.

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    2018-04-25 amy0550
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    2018-01-05 1dd8c52fm63(暂无匿称)

    了解了解.学习学习

    0

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    2017-12-05 131****1460

    学习了受益匪浅

    0

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