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Pediatrics:母乳喂养可降低婴儿肥胖风险

来源:生物谷 2014-12-22 10:53

2014年12月22日讯 /生物谷BIOON/ --对于高危肥胖婴儿,他们喂母乳时间越长,就越不可能会成为超重。近日一项新的研究表明:母乳喂养持续时间越长,似乎对超重和肥胖的早期征兆越有保护作用。研究员Stacy Carling博士生和她的同事追访595名孩子(从出生到2岁),他们在这个时间内追踪记录孩子的重量和身高,并比较将儿童的成长轨迹与这些孩子吃母乳时间长短关联起来。

当考虑高风险的体重增加,儿童身体质量指数(BMI)涨幅高于平均水平更快,随着他们成长。BMI是根据人的身高和体重的测量。

获得额外体重风险最高儿童的母亲包括那些超重或肥胖母亲,教育水平低母亲和怀孕期间吸烟的母亲。595名儿童中近59%的孩子处于超重危险之中,其母亲曾有以上一个或多个特征。在这些肥胖风险较高的儿童中,婴儿母乳喂养不到两个月的时间。相比于吃母乳至少4个月的儿童,母乳喂养不到两个月时间的婴儿有超过两倍多的可能性获得额外的重量。

这项研究结果发表在Pediatrics杂志上。但这项研究并不能证明母乳喂养会造成肥胖的风险降低。仍然有多种原因影响婴儿肥胖,该研究的作者指出了为什么母乳喂养和肥胖风险降低之间可能存在联系。研究揭示母乳喂养的婴儿可能允许饥饿和饱腹感信号的正常发育,可以帮助防止某些因素导致的超重和肥胖的行为。

同时研究指出在婴儿需要时进行喂母乳(比如婴儿饿了的时候),从而可以促婴儿食欲控制的早期发育。当母乳喂养婴儿,母亲可以控制婴儿母乳获得的时间和频率,婴儿能自然地应对饥饿和饱食感信号。这项研究由美国卫生国家研究院资助。(生物谷Bioon.com)

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Breastfeeding Duration and Weight Gain Trajectory in Infancy

Stacy J. Carling,et al.

BACKGROUND AND OBJECTIVES: Short breastfeeding duration may exacerbate accelerated early growth, which is linked to higher obesity risk in later life. This study tested the hypothesis that infants at higher risk for obesity were more likely to be members of a rising weight-for-length (WFL) z score trajectory if breastfed for shorter durations.

METHODS: This prospective, observational study recruited women from an obstetric patient population in rural central New York. Medical records of children born to women in the cohort were audited for weight and length measurements (n = 595). We identified weight gain trajectories for infants’ WFL z scores from 0 to 24 months by using maximum likelihood latent class models. Individual risk factors associated with weight gain trajectories (P ≤ .05) were included in an obesity risk index. Logistic regression analysis was performed to investigate whether the association between breastfeeding duration (<2 months, 2–4 months, >4 months) and weight gain trajectory varied across obesity risk groups.

RESULTS: Rising and stable weight gain trajectories emerged. The obesity risk index included maternal BMI, education, and smoking during pregnancy. High-risk infants breastfed for <2 months were more likely to belong to a rising rather than stable weight gain trajectory (odds ratio, 2.55; 95% confidence interval, 1.14–5.72; P = .02).

CONCLUSIONS: Infants at the highest risk for rising weight patterns appear to benefit the most from longer breastfeeding duration. Targeting mothers of high-risk infants for breastfeeding promotion and support may be protective against overweight and obesity during a critical window of development.

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