To examine breastfeeding, individual and household risk factors for malnutrition (i.e., overweight and stunting) among Mexican-origin children aged 6 to 35 months living in Mexico and the US. We ran logistic regression models using subsamples of the 2012 Mexican National Health and Nutrition Survey, and four waves (2007-2014) of the US National Health and Nutrition Examination Survey. We found evidence for a protective effect of any breastfeeding on stunting in Mexico. Risk factors for overweight and stunting across countries were high- and low-birthweight, correspondingly. An additional risk factor for overweight was introducing complementary foods before 6 months; while being male, living in Mexico and moderate-severe household food insecurity were additional risk factors for stunting. To prevent malnutrition among Mexican-origin children, pre- and post-natal culturally-sensitive policies and interventions in both countries should be aimed toward preventing high- and low-birthweight, and promoting positive maternal health behaviors such as appropriate child feeding practices.

调查居住在墨西哥和美国的 6 至 35 个月的墨西哥裔儿童的母乳喂养、营养不良（即超重和发育迟缓）的个人和家庭危险因素。我们使用 2012 年墨西哥国家健康和营养调查的子样本和美国国家健康和营养检查调查的四波 (2007-2014) 运行逻辑回归模型。我们发现了任何母乳喂养对墨西哥发育迟缓的保护作用的证据。相应地，各国超重和发育迟缓的风险因素分别是高出生体重和低出生体重。超重的另一个风险因素是在 6 个月前添加辅食；作为男性，居住在墨西哥和中等严重的家庭粮食不安全是导致发育迟缓的额外风险因素。为防止墨西哥裔儿童营养不良，