近30万中国女性调研数据揭示:母乳喂养降低宝妈心脏病风险!
2017/06/26
母乳喂养是为婴儿提供健康成长和发育所需营养的理想方式。除此之外,它还有利于母亲健康,包括降低胆固醇、血压、血糖、体重等指标。现在,一篇最新文章表明,长期母乳喂养还有利于降低母亲发生心脏病、中风的风险。


“母乳喂养不仅仅有利于宝宝健康,还有望降低母亲发生心脏病、中风的风险。”

这是近期发表在《Journal of the American Heart Association》期刊上的一篇文章的最新结论。来自于牛津大学的研究团队对近30万中国女性调研发现,每额外增加6个月的哺乳期,妈妈发生心脏病、中风的概率会大大降低。

先前的研究已经表明,母乳喂养有利于宝妈产后恢复,例如胆固醇、血压、血糖、体重等指标降低。但是,长期母乳喂养对母亲的心血管健康影响却不清晰。

母乳喂养降低心脏病、中风风险

为了更好的了解其中的关联性,牛津大学的Zhengming Chen、Mark Woodward带领团队对289,573例中国女性进行了长达8年的随访调研。这些参与者都没有心血管疾病病史,且几乎都有小孩。研究人员负责统计她们的生育信息(包括是否母乳喂养以及喂养时间)和8年间心脏病和中风的发病率。

总体而言,相比于从未母乳喂养的女性,选择母乳喂养的女性发生心脏病的概率降低了9%、中风概率也降低了8%。同时,有过2年以上的母乳喂养历史的女性,她们发生心脏病的概率降低了18%、中风概率降低了17%。

更重要的是,每额外增加6个月的哺乳期,女性发生心脏病、中风的概率会相应地降低4%、3%。即便考虑吸烟、 糖尿病 , 高血压等影响心血管健康的因素,这一风险降低结果依然不变。

母乳喂养会“重置”母亲的新陈代谢

为什么母乳喂养有利于心血管健康?研究人员目前仍然无法解析背后的分子机制,但是他们推测,心脏病、中风风险的降低与怀孕后母亲新陈代谢“重置”有关。

研究人员解释说:“怀孕会显著改变孕妈的新陈代谢,例如脂肪储存的方式。母乳喂养会消除孕期脂肪快速储存的代谢过程。”

虽然这只是一项观察性研究,并不能直接证实因果关系,但是研究人员认为他们的结果进一步证明母乳喂养的好处。“这一发现可以更好地鼓励宝妈坚持母乳喂养。”他们强调道。

参考资料:

Breast-feeding mothers at lower risk of heart disease, stroke

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  • Breastfeeding and the Risk of Maternal Cardiovascular Disease: A Prospective Study of 300 000 Chinese Women

    Background Breastfeeding confers substantial benefits to child health and has also been associated with lower risk of maternal cardiovascular diseases (CVDs) in later life. However, the evidence on the effects of CVD is still inconsistent, especially in East Asians, in whom the frequency and duration of breastfeeding significantly differ from those in the West. Methods and Results In 2004–2008, the nationwide China Kadoorie Biobank recruited 0.5 million individuals aged 30 to 79 years from 10 diverse regions across China. During 8 years of follow‐up, 16 671 incident cases of coronary heart disease and 23 983 cases of stroke were recorded among 289 573 women without prior CVD at baseline. Cox regression yielded adjusted hazard ratios (HRs) and 95% CIs for incident CVD by breastfeeding. Overall, ≈99% of women had given birth, among whom 97% reported a history of breastfeeding, with a median duration of 12 months per child. Compared with parous women who had never breastfed, ever breastfeeding was associated with a significantly lower risk of CVD, with adjusted HRs of 0.91 (95% CI, 0.84–0.99) for coronary heart disease and 0.92 (95% CI, 0.85–0.99) for stroke. Women who had breastfed for ≥24 months had an 18% (HR, 0.82; 0.77–0.87) lower risk of coronary heart disease and a 17% (HR, 0.83; 0.79–0.87) lower risk of stroke compared with women who had never breastfed. Among women who ever breastfed, each additional 6 months of breastfeeding per child was associated with an adjusted HR of 0.96 (95% CI, 0.94–0.98) for coronary heart disease and 0.97 (95% CI, 0.96–0.98) for stroke. Conclusions Among Chinese women, a history of breastfeeding was associated with an ≈10% lower risk of CVD in later life and the magnitude of the inverse association was stronger among those with a longer duration of breastfeeding.

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