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Obesity:体重正常但腰粗 ,更易患痴呆症

2019-11-08 佚名 医学新视点

痴呆症影响全世界约5000万人,每年有近1000万新发病例。世界卫生组织发布的《降低认知衰退和痴呆症风险指南》提出,超重和肥胖是痴呆症的危险因素。体重指数(BMI)是衡量是否肥胖的重要指标,不过根据一项新的研究,腰围(WC)相比于BMI,更能反映腹部内脏脂肪水平。

痴呆症影响全世界约5000万人,每年有近1000万新发病例。世界卫生组织发布的《降低认知衰退和痴呆症风险指南》提出,超重和肥胖是痴呆症的危险因素。体重指数(BMI)是衡量是否肥胖的重要指标,不过根据一项新的研究,腰围(WC)相比于BMI,更能反映腹部内脏脂肪水平。

一项发表在肥胖学会官方期刊Obesity的大规模队列研究显示,在老年人群体中,体重正常但腹型肥胖的人,相比于没有腹部肥胖的人,患痴呆症的风险显着增加。

研究人员对超过87万名受试者进行了随访研究,他们的年龄在65岁及以上,并在2009年1月1日至2009年12月31日参加了韩国国家健康筛查。研究人员对他们随访直至发展为痴呆症、死亡或2015年12月31日随访结束,平均随访达6.5年。腹型肥胖的标准为男性腰围 ≥90cm,女性腰围≥85m。

在随访期间,有114024位受试者被诊断出痴呆症。在调整了其他变量因素后,如年龄、BMI、生活方式、经济状况及各种心血管疾病风险,研究人员发现,整体而言,在腹型肥胖的人群中,痴呆症风险随着腰围的增加而增加。比如,腰围≥110cm,男性和女性痴呆症风险分别增加63%和58%。

而BMI的影响则似乎相反。相较于BMI正常的人群,体重偏轻的老年男性和女性痴呆症风险分别升高21%和26%,超重和肥胖人群则风险较低。

为何会有截然相反的发现?研究人员又进一步分析了腹型肥胖(即腰围)和全身体重的综合影响。统计显示,对于体重正常的腹型肥胖者,患痴呆症的风险仍然显着增加,男性增加了15%,女性增加了23%;不过在按BMI属于超重和肥胖的腹型肥胖者中,患痴呆症的风险显着降低。这表明,腰围对痴呆症风险的影响,可能因个人的BMI不同而有区别。

科罗拉多大学(University of Colorado School)医学院Dan Bessesen博士认为:“该研究可能指出了皮下脂肪与腹部脂肪在痴呆症发展中的不同作用,皮下脂肪具有保护作用,腹部脂肪则有害。而BMI与痴呆症的关联,可能更多反映了老年人群的‘瘦’体重,老年人群BMI偏低可能是肌肉流失的表现。”

该研究通讯作者、韩国高丽大学(Korea University)九老医院副教授Hye Jin Yoo表示:“这项研究强调,在评估老年人与肥胖相关的痴呆风险时,应考虑腰围。”

腰粗的风险在众多研究中都有所体现。剑桥大学(university of cambridge)的一项研究显示,脂肪堆积在内脏器官或血液中的人,更容易得2型糖尿病和心血管疾病,而这两方面也都是痴呆症的风险因素。这项研究再次提醒我们,低头看看,谨防肚子上长太多肉。

原始出处:
Cho GJ1, Hwang SY2, Lee KM3, et al.Association Between Waist Circumference and Dementia in Older Persons: A Nationwide Population-Based Study.Obesity (Silver Spring). 2019 Nov;27(11):1883-1891. doi: 10.1002/oby.22609.

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    2020-04-26 Boyinsh
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    2020-09-28 zhanglin3079
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    2019-11-10 lingaifan
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    2019-11-08 junJUN

    老年人痴呆何药可用??

    0

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