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JAMA Pediatr:母乳喂养或可降低亚洲儿童肥胖风险

2013-08-15 佚名 EGMN

《美国医学会杂志-儿科》8月12日在线发表的一篇报告显示,根据对超过6万名日本儿童的分析,接受至少6个月母乳喂养的儿童在7~8岁时超重或肥胖的风险,显著低于接受配方奶喂养的儿童。【原文下载】 主要研究者、日本冈山大学流行病学系的山川美智代指出,母乳喂养与肥胖的关联最强。具体而言,单纯母乳喂养至少6个月与童年肥胖风险降低45%、超重风险降低15%有关。 既往多项研究显示,母乳喂养具有对抗童年

《美国医学会杂志-儿科》8月12日在线发表的一篇报告显示,根据对超过6万名日本儿童的分析,接受至少6个月母乳喂养的儿童在7~8岁时超重或肥胖的风险,显著低于接受配方奶喂养的儿童。【原文下载

主要研究者、日本冈山大学流行病学系的山川美智代指出,母乳喂养与肥胖的关联最强。具体而言,单纯母乳喂养至少6个月与童年肥胖风险降低45%、超重风险降低15%有关。

既往多项研究显示,母乳喂养具有对抗童年肥胖的保护作用,多数研究报告称风险可降低15%~20%。但近期若干项研究(包括唯一的另一项针对亚洲人群的相关研究)的结论是,母乳喂养不具有预防儿童肥胖的作用,这种不一致可能是母乳喂养相关因素(例如社会经济地位、饮食习惯、体力活动水平和吸烟状态等母亲因素)引起混淆的结果。

山川美智代及其同事利用一个大型全国数据库探讨了这一问题。这项名为“21世纪婴儿纵向调查”的研究从2001年开始收集家长提供的关于家庭环境、育儿方式和儿童健康、发育的数据,目前仍在进行中。

本次发表的分析涉及29,907名7岁儿童和30,780名8岁儿童,其家长从儿童6个月大时开始参与调查。所有受试者均未单胎足月儿。利用这些数据,研究者计算了受试者目前体重指数、看电视时间、玩电脑游戏时间,并且评估了家长的营养知识、母亲的受教育程度、吸烟状态和工作状态。

结果显示,超过20%的受试者接受了至少6个月单纯母乳喂养,超过70%在此期间接受了部分母乳喂养。仅有5%~6%的儿童曾接受单纯配方奶喂养。研究者指出,日本社会强烈鼓励母乳喂养,这可能是上述比例与西方国家差异较大的原因之一。

在7岁组中,7.3%的儿童超重,2.1%肥胖。超重和肥胖的流行率均随着母乳喂养时间延长而降低,呈现出剂量依赖关系。在校正多种混淆因素的影响之后,母乳喂养的抗超重/肥胖保护效应仍然保持着显著性。

8岁组得出了相似结果:超重率和肥胖率分别为7.8%和1.9%,二者均随着母乳喂养时间延长而降低,这一相关性在校正多种混淆因素后仍然显著。

这项研究获得了日本厚生劳动省和住友基金会的经费支持。研究者无利益冲突披露。

原始出处:

Michiyo Yamakawa, MHSc; Takashi Yorifuji, MD, PhD; Sachiko Inoue, MMS; Tsuguhiko Kato, PhD; Hiroyuki Doi, MD, PhD.Breastfeeding and Obesity Among Schoolchildren A Nationwide Longitudinal Survey in Japan.JAMA Pediatr. 2013;():-. doi:10.1001/jamapediatrics.2013.2230. 【原文下载

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    2014-07-17 feather89
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    2013-08-17 villahu
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