Das Risiko für Verhaltensprobleme im Alter von fünf Jahren ist bei nicht-gestillten Kindern um 30 Prozent erhöht.
Die Studie:http://www.bbc.co.uk/news/health-13336986Behaviour problems
By Jane Hughes Health correspondent, BBC News, 10 May 2011
Researchers looked at the feeding habits of 10,037 mothers and their babies involved in a large study known as the Millennium Cohort Study.
The mothers were asked to assess problems in their children by the age of five, including anxiousness and clinginess, restlessness, and lying or stealing.
Only 6% of children who were breastfed showed signs of behaviour problems, compared with 16% of children who were formula-fed.Mothers who breastfeed tend to be older, better educated, and from a higher socio-economic background, which may contribute towards fewer problems in their children's behaviour.
But even after the researchers, from the Universities of Oxford, Essex, York and University College London, adjusted their figures to take that into account, they still found there was a 30% greater risk of behavioural problems among formula-fed children.
"Our results provide even more evidence for the benefits of breastfeeding," said Maria Quigley of Oxford University, who led the research.
She said breast milk contained large quantities of a particular type of fatty acid, as well as growth factors and hormones, which were important for the development of the brain and nervous system.
But mothers who breastfeed also tend to interact with their children more, which could mean the babies learn more about acceptable ways of behaving.
Breastfed children also get ill less often, which may affect their behaviour."