Breastfeeding and childhood cancer risks: OSCC data

The UK Childhood Cancer Study (UKCCS) has reported weak evidence of a protective effect of breastfeeding for childhood cancers overall (Beral et al, 2001). It was concluded that breastfeeding may well offer a modest protective effect on childhood cancers overall or that some systematic bias was operating in the majority of the published studies. No findings were available from the Oxford Survey of Childhood Cancers (OSCC) on breastfeeding and childhood cancer risks; these are now provided.