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Revista chilena de pediatría

versão impressa ISSN 0370-4106


OYARZUN, María Fernanda et al. Breastfeeding, obesity and metabolic syndrome in school-age. Rev. chil. pediatr. [online]. 2018, vol.89, n.2, pp.173-181.  Epub 06-Abr-2018. ISSN 0370-4106.


Breastfeeding (BF) can be a protective factor against obesity and its associated metabo lic complications.


To determine the association between breastfeeding history and present obesity, metabolic syndrome (MS) and insulin resistance (IR).

Patients and Methods:

Cross-sectio nal study in 20 public schools in Santiago, Chile. Anthropometry and blood pressure were assessed. Blood lipids, glucose, insulin and HOMA index were measured in a fast blood sample. Parents answe red a survey on BF. MS was defined according to Cook's criteria and IR as HOMA > 90th percentile. Parents answered a survey about the antecedent of breastfeeding. Chi2 and Fischer tests were used (SSPS).


3,278 surveys were valid. Average age: 11.4 ± 1 years, 52.3% were female. Most of them (98.2%) were breasted, with a 15.9% prevalence of obesity versus 18.6% in the group that was not breastfed (p = 0.039). There was a non-significant trend of higher prevalence in MS and its com ponents (except IR) in the non-breastfed group. The group breastfed from three to six months had a lower prevalence of obesity and MS components than the 0 to 3 months group ; the effect was the opposite when BF lsted longer than nine months.


The prevalence of obesity was higher in children that did not received breastfeeding. A longer breastfeeding time during the first semester of life was associated with lower prevalence of obesity and metabolic complications.

Palavras-chave : Breastfeeding; cardiovascular risk; obesity; insulin resistance; metabolic syndrome; pediatric.

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